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Essay On Electricity

Electricity is a form of energy, as we have other forms of energy like heat and light. We feel the existence of electricity when a refrigerator is on, an electric heater is on, or when an electric bulb is switched on. It is fascinating that electrical appliances like ceiling fans, mobile phones, laptops, etc., surround us. Also, the natural phenomenon of lightning striking the ground involves electricity. Here are a few sample essays on ‘Electricity’.

100 Words Essay On Electricity

Electricity is a form of energy that is used to power lights, appliances, and many other things in our homes and buildings. It is created by generators, which use fuel to create a flow of electric charges. These charges are then sent through wires to our homes, where they power everything from our lights to our televisions.

Electricity is a powerful force that can be both helpful and dangerous. It is important to always be careful around electricity and to follow safety rules when using it.

Overall, electricity is an essential part of modern life and is used to power many of the things that make our lives easier and more convenient. Understanding how electricity works and how to use it safely is an important part of being a responsible student and citizen.

200 Words Essay On Electricity

Electricity is a form of energy that is all around us and plays a vital role in our daily lives. It is the force that powers everything from the lights in our homes to the computers we use at school.

Science Behind It | Electricity is a flow of tiny particles called electrons. These electrons flow through wires and create a current, which is what powers our lights and appliances. The electricity that we use in our homes is created at power plants, where generators use fuel like coal, natural gas, or wind to create the flow of electrons. It is sent through a network of transmission and distribution lines, which are like a big spider web, to reach different parts of the country. From there, it is sent to homes and buildings through smaller wires called service lines.

It is important to remember that electricity can be both helpful and dangerous. It is important to follow safety rules when using electricity. For example, it is important to never touch electrical wires with wet hands or to plug too many things into one outlet. Always be sure to ask an adult for help if you have any questions or concerns about electricity.

500 Words Essay On Electricity

Electricity is a powerful force that has a significant impact on our daily lives. It is the energy that powers everything from the lights in our homes to the computers we use at school. It enables us to have access to modern appliances, technology and communication.

How Electricity Affects Our Lives

One of the most obvious ways that electricity affects our lives is by providing the power for our lights, appliances, and other devices. Without electricity, we would have to rely on things like candles and manual labor to get things done. This would make our lives much more difficult and less convenient.

Electricity also plays a vital role in communication, it allows us to stay connected with friends and family through phone calls, text messages, and social media. It also allows us to access information and entertainment through the internet, television, and radio.

Furthermore, electricity also contributes to the development of industries, it is used to power machines and equipment that are essential for manufacturing and production, without electricity, it would be difficult to produce goods and services.

However, it is also important to consider the negative effects of electricity on the environment. The production of electricity often involves burning fossil fuels which release pollutants into the air and contribute to global warming. Moreover, the overuse of electricity can lead to power shortages and blackouts.

Overall, electricity has a profound effect on our lives, it makes our lives easier and more convenient, it contributes to communication and industry development, but it also has negative effects on the environment. It is important to be aware of how we use electricity and to make a conscious effort to use it responsibly and efficiently.

Discovery Of Electricity

The discovery of electricity is a story that spans centuries, with many important figures contributing to our understanding of this powerful force.

It all began in ancient times, with the Greeks and Romans experimenting with static electricity by rubbing different materials together. They observed that certain materials, such as amber, would become charged and attract nearby objects.

In the 1600s, English scientist William Gilbert conducted extensive research on electricity and magnetism, and coined the term "electricus," meaning "like amber." He also discovered that many materials, not just amber, could become charged.

In the 1700s, several scientists made significant advancements in the understanding of electricity. Benjamin Franklin conducted his famous kite experiment, proving that lightning was a form of electricity. He also invented the lightning rod, which protected buildings from lightning strikes.

In the 1800s, scientists such as Alessandro Volta and Michael Faraday made even more strides in our understanding of electricity. Volta created the first battery, while Faraday discovered the principle of electromagnetic induction, which is the basis for the operation of generators and motors.

As the years went on, scientists continued to make advancements in our understanding of electricity. The invention of the light bulb by Thomas Edison in 1879 changed the world forever, making electric light a practical reality for the first time.

Throughout the years, many people have contributed to our understanding of electricity, and it is a story of curiosity, experimentation and perseverance. Today we are able to enjoy the convenience and comfort that electricity has brought to our lives, but it all started with a spark of curiosity and a desire to understand the world around us.

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Data Administrator

Database professionals use software to store and organise data such as financial information, and customer shipping records. Individuals who opt for a career as data administrators ensure that data is available for users and secured from unauthorised sales. DB administrators may work in various types of industries. It may involve computer systems design, service firms, insurance companies, banks and hospitals.

Bio Medical Engineer

The field of biomedical engineering opens up a universe of expert chances. An Individual in the biomedical engineering career path work in the field of engineering as well as medicine, in order to find out solutions to common problems of the two fields. The biomedical engineering job opportunities are to collaborate with doctors and researchers to develop medical systems, equipment, or devices that can solve clinical problems. Here we will be discussing jobs after biomedical engineering, how to get a job in biomedical engineering, biomedical engineering scope, and salary.

Ethical Hacker

A career as ethical hacker involves various challenges and provides lucrative opportunities in the digital era where every giant business and startup owns its cyberspace on the world wide web. Individuals in the ethical hacker career path try to find the vulnerabilities in the cyber system to get its authority. If he or she succeeds in it then he or she gets its illegal authority. Individuals in the ethical hacker career path then steal information or delete the file that could affect the business, functioning, or services of the organization.

GIS officer work on various GIS software to conduct a study and gather spatial and non-spatial information. GIS experts update the GIS data and maintain it. The databases include aerial or satellite imagery, latitudinal and longitudinal coordinates, and manually digitized images of maps. In a career as GIS expert, one is responsible for creating online and mobile maps.

Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

Geothermal Engineer

Individuals who opt for a career as geothermal engineers are the professionals involved in the processing of geothermal energy. The responsibilities of geothermal engineers may vary depending on the workplace location. Those who work in fields design facilities to process and distribute geothermal energy. They oversee the functioning of machinery used in the field.

Database Architect

If you are intrigued by the programming world and are interested in developing communications networks then a career as database architect may be a good option for you. Data architect roles and responsibilities include building design models for data communication networks. Wide Area Networks (WANs), local area networks (LANs), and intranets are included in the database networks. It is expected that database architects will have in-depth knowledge of a company's business to develop a network to fulfil the requirements of the organisation. Stay tuned as we look at the larger picture and give you more information on what is db architecture, why you should pursue database architecture, what to expect from such a degree and what your job opportunities will be after graduation. Here, we will be discussing how to become a data architect. Students can visit NIT Trichy , IIT Kharagpur , JMI New Delhi .

Remote Sensing Technician

Individuals who opt for a career as a remote sensing technician possess unique personalities. Remote sensing analysts seem to be rational human beings, they are strong, independent, persistent, sincere, realistic and resourceful. Some of them are analytical as well, which means they are intelligent, introspective and inquisitive.

Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.

Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

Finance Executive

Product manager.

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.

Operations Manager

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

Stock Analyst

Individuals who opt for a career as a stock analyst examine the company's investments makes decisions and keep track of financial securities. The nature of such investments will differ from one business to the next. Individuals in the stock analyst career use data mining to forecast a company's profits and revenues, advise clients on whether to buy or sell, participate in seminars, and discussing financial matters with executives and evaluate annual reports.

A Researcher is a professional who is responsible for collecting data and information by reviewing the literature and conducting experiments and surveys. He or she uses various methodological processes to provide accurate data and information that is utilised by academicians and other industry professionals. Here, we will discuss what is a researcher, the researcher's salary, types of researchers.

Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues.

Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems.

Safety Manager

A Safety Manager is a professional responsible for employee’s safety at work. He or she plans, implements and oversees the company’s employee safety. A Safety Manager ensures compliance and adherence to Occupational Health and Safety (OHS) guidelines.

Conservation Architect

A Conservation Architect is a professional responsible for conserving and restoring buildings or monuments having a historic value. He or she applies techniques to document and stabilise the object’s state without any further damage. A Conservation Architect restores the monuments and heritage buildings to bring them back to their original state.

Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software.

Highway Engineer

Highway Engineer Job Description: A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

Field Surveyor

Are you searching for a Field Surveyor Job Description? A Field Surveyor is a professional responsible for conducting field surveys for various places or geographical conditions. He or she collects the required data and information as per the instructions given by senior officials.

Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

Pathologist

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

Veterinary Doctor

Speech therapist, gynaecologist.

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth.

Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

Are you searching for an ‘Anatomist job description’? An Anatomist is a research professional who applies the laws of biological science to determine the ability of bodies of various living organisms including animals and humans to regenerate the damaged or destroyed organs. If you want to know what does an anatomist do, then read the entire article, where we will answer all your questions.

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs.

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

Choreographer

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

Photographer

Photography is considered both a science and an art, an artistic means of expression in which the camera replaces the pen. In a career as a photographer, an individual is hired to capture the moments of public and private events, such as press conferences or weddings, or may also work inside a studio, where people go to get their picture clicked. Photography is divided into many streams each generating numerous career opportunities in photography. With the boom in advertising, media, and the fashion industry, photography has emerged as a lucrative and thrilling career option for many Indian youths.

An individual who is pursuing a career as a producer is responsible for managing the business aspects of production. They are involved in each aspect of production from its inception to deception. Famous movie producers review the script, recommend changes and visualise the story.

They are responsible for overseeing the finance involved in the project and distributing the film for broadcasting on various platforms. A career as a producer is quite fulfilling as well as exhaustive in terms of playing different roles in order for a production to be successful. Famous movie producers are responsible for hiring creative and technical personnel on contract basis.

Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism , Advertising , Marketing Management . Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook.

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion.

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article.

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

Individuals who opt for a career as a reporter may often be at work on national holidays and festivities. He or she pitches various story ideas and covers news stories in risky situations. Students can pursue a BMC (Bachelor of Mass Communication) , B.M.M. (Bachelor of Mass Media) , or MAJMC (MA in Journalism and Mass Communication) to become a reporter. While we sit at home reporters travel to locations to collect information that carries a news value.

Corporate Executive

Are you searching for a Corporate Executive job description? A Corporate Executive role comes with administrative duties. He or she provides support to the leadership of the organisation. A Corporate Executive fulfils the business purpose and ensures its financial stability. In this article, we are going to discuss how to become corporate executive.

Multimedia Specialist

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications.

Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product.

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

Production Manager

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans.

Process Development Engineer

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Save Electricity Essay – 10 Lines, Short & Long Essay For Kids

Key Points To Note: Essay On ‘Save Electricity’ For Lower Primary Classes

10 lines on ‘save electricity’ for kids, a paragraph on ‘save electricity’ for children, short essay on ‘save electricity’ for kids, long essay on ‘importance of saving electricity’, what will your child learn from this essay.

We use electricity for almost everything nowadays, and it seems impossible to live without it. However, we waste too much electrical energy without considering the consequences. This article will discuss the topic ‘save electricity’ for classes 1, 2 and 3. We must save electricity to use it in the future, and we must preserve energy so future generations can benefit from it. Conservation of electricity essay is the best way to teach kids about the rising concern of electricity. It will sensitise them about the importance of the conservation of electricity, and they will learn how they can cooperate to achieve the same.

Your child should keep a few key aspects in mind when writing an essay on this topic. Let us demonstrate how to create an essay about electricity conservation for your youngster:

The first stage is to have your youngster organise the concepts (in their heads) regarding the electricity conservation that they wish to write about.
Allow your kid to jot down their thoughts to create an outline that will allow them to cover all of the themes while writing the essay in the second phase.
They will build easy-to-read short and basic phrases in the third phase.
Your child can write about the value of electricity conservation, how saving electricity can save mankind, and so on.

Consider what your life would be like if you didn’t have access to electricity. There will be no tablets, light bulbs, or snack refrigerators. Isn’t it difficult to imagine? We have a few lines below that will help children write an essay for classes 1 and 2 on saving electricity in English.

Electricity is an important resource today. We need electricity for everything that we do, so we must try to save it as much as possible.
Electricity is derived from coal and other natural resources extracted from the earth, so we can save the earth by saving electricity.
Electricity is also harnessed from water, which is a crucial natural resource.
We must use energy-saving products such as LED blulbs.
If we switch off all the lights and fans when not in use, we can save a lot of electricity.
We should turn off electric appliances to save electricity when they are not in use.
We also can save electricity by using energy-efficient refrigerators, air coolers, and air conditioners.
Solar panels are a great alternative to reducing energy consumption.
We can burn less fuel and conserve water to save electricity.
If we save electricity, it can be distributed more efficiently.

Electricity is important for everyone, and children are the future, so we should teach them to save electricity. Below is the paragraph that will help children write an essay on saving electricity:

Electricity is one of humanity’s greatest discoveries. The discovery of electricity signalled the start of bigger findings relevant to humankind. Electricity has transformed our way of living, and it should be saved at home and in the workplace, organisations, and classrooms. Every individual should be responsible for saving power. Saving electricity saves money as well. We, as students, must take responsibility for switching off lights and equipment when not in use. Appliances that are not in use should also be unplugged. Installing solar panels is beneficial and cost-effective.

Power drives the world, and if we have plenty of it, we also have responsibility. Given below is the essay for classes 1, 2 and 3 on saving electricity.

We should conserve energy. We require electricity at all times and for a variety of social purposes. Electricity is seen as the heart of existence, without which the entire world remains black at night in the current world. Our healthcare, teaching, farming, technology, and other specialised activities depend on electricity. The expert in the activity theatre, the engineer in the industry, the engine technician in the garage, the officer at the workplace, and the passengers at the train station, all benefit from the administration provided by electricity. Indeed, even our minor efforts to conserve electricity will be beneficial. We should be careful about the electric devices we use at home. Fans, lighting, air conditioning systems, coolers, and water heaters must be used properly. TVs should not be turned on when nobody is watching them. We should use sunlight wherever we can as it will help conserve energy. We should all make an effort to preserve electricity.

Electricity saved is electricity generated. This essay for class 3 on saving electricity will help your child organise their thoughts:

Electricity is one of the most important resources for any lifestyle. Our daily lives are powered by electricity. It is difficult to picture living without electricity now. Thus, preserving electricity is critical for human survival.

Uses of Electricity

We use electricity in nearly every aspect of our lives; we require it to live a pleasant life full of comforts and services. Without power, the world will become dormant. Electricity, for example, powers all medical and educational institutions. If there is no power, a surgeon cannot execute the necessary surgeries, and students cannot obtain practical experience, for which the internet is crucial. Similarly, workers in workshops and engineers in plants rely on electricity to perform properly. Passengers on the railway and airport may also travel securely because there is electricity around.

Why Is It Important to Save Electricity?

Electricity sources are likely to run out. Energy, it is true, cannot be generated or destroyed. However, the energy sources from which it is derived are expected to diminish. For example, coal, which significantly contributes to the creation of power, is rapidly decreasing. This necessitates energy conservation. Saving electricity aids in the conservation of natural resources, allowing for economic savings.

Ways To Save Electricity

There is no industrial sector or other areas in today’s world where electricity is not utilised. People must realise that even little steps may go a long way toward saving power.

We should use natural light more often and turn off the lights in the morning and afternoon when it is not needed.
We should make every effort to make our own homes more energy efficient.
Remember to disconnect your electrical appliances when they are not in use since even when they are inactive, they consume 10% of the power. Unplug them to conserve electricity.
All outdated appliances that use a lot of power should be replaced.
One of the most effective strategies to save power is to use renewable energy sources such as solar and wind energy.

Your child will learn to think about different aspects of electricity. It will develop their observation and thought process toward electricity. They will also learn about the importance of saving electricity.

1. Who Invented Electricity, And When?

Benjamin Franklin invented electricity in 1752.

2. What Are The Names Of Some Less Useful Electric Appliances?

Backyard Lamps
Egg boilers

Writing an essay on topics like saving electricity plays a major role in developing their social and mental ability. Your child will observe the importance of electricity around them and try to write them down, improving their creative and expressive skills.

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Save Electricity Essay for Students and Children

500+ words essay on save electricity.

Electricity is an essential resource for a thriving life. It runs our daily life. Life without electricity would be impossible to imagine now. We generate electricity using coal or natural gas. However, people do not realize the natural resources to do as are limited and non-renewable. We must conserve electricity so that we can conserve these resources.

In other words, electricity serves mankind greatly. We must stop the wastage of power. The world will lose its light if there is no electricity. Moreover, careless behavior by humans must be checked. We need to realize the importance of electricity to save ourselves from the darkness.

Need for Electricity

Electricity is needed in almost every sphere of life now. We need it to lead a comfortable life full of all amenities and services. The world will become dormant without electricity. For instance, all our health and education facilities are conditioned by electricity. If there is no electricity, the surgeon won’t be able to perform his surgery. Moreover, students won’t be able to gain practical knowledge.

Likewise, motor mechanics in the garages and engineers in the factory depend on electricity. Furthermore, the passengers at the railway station and the airport can travel safely due to electricity only.

In addition, various means of transportation depend on electricity only. Trams and metros carry thousands of people every day. All this is made possible due to electricity only. Electricity boosts our modern life and helps in making it civilized.

Get the huge list of more than 500 Essay Topics and Ideas

How to Save Electricity

Firstly, all of us must understand that even a small step will go a very long way in saving electricity. For instance, if every person at each home switches on the fan when not in use, thousands of watts of electricity can be saved.

Similarly, if we use our air conditioners, heaters, ovens, refrigerators and more properly, we can successfully save large amounts of electricity.

Furthermore, try making use of natural light more. Do not keep the lights unnecessarily in the morning and afternoons. Make do with the natural light as it is enough. We must replace all our old appliances as they consume a lot of electricity. In other words, we must strive to make our homes energy efficient.

Moreover, always remember to unplug your electrical gadgets when not in use. These devices consume at least 10% of electricity even when inactive. Thus, unplug them to save electricity.

In addition, try to cut down your TV watching time. Encourage kids to read and play outside instead. Likewise, try using laptops in place of desktops. Desktops consume more energy than a laptop. You must also switch off the fans if you using your air conditioner, thereby avoiding unnecessary wastage.

Most importantly, installing solar panels can help you excessively. They are very economical and help in saving a lot of energy. The solar panels will help in consuming lesser energy that too economically. Similarly, the industries which use megawatts of electricity must install windmills. This can help in getting cheap electricity through natural means.

{ “@context”: “https://schema.org”, “@type”: “FAQPage”, “mainEntity”: [{ “@type”: “Question”, “name”: “Why is Electricity important?”, “acceptedAnswer”: { “@type”: “Answer”, “text”: “Electricity powers all the facilities now. It helps a surgeon perform life-saving surgery. Similarly, it helps students in learning practical knowledge at school. Furthermore, people lead a comfortable life all thanks to electricity.”} }, { “@type”: “Question”, “name”: “How can we save electricity?”, “acceptedAnswer”: { “@type”: “Answer”, “text”:”One can adopt a number of ways to save electricity. Make sure to use natural light to the fullest and avoid turning on lights in the morning and afternoon. Moreover, always switch off fans and lights when not in use. Unplug your gadgets and install solar panels to get economic electricity.”} }] }

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Essay on Electricity in English For Students & Children

We are Sharing an Essay on Electricity in English for students and children. In this article, we have tried our best to provide a Short essay on Electricity for Classes 4,5,6,7,8,9,10,11,12, and Graduation in 200, 300, 400, 500, 800 words.

Essay on Electricity 250 words

Electricity is one of the greatest and most useful discoveries of the twentieth century.

At present, we can’t live without electricity. Dozens of gadgets In our homes run with the help of electricity. Such is the AC, the desert cooler, the fan, the room-heater, the electric bulbs and tubes, the TV, the computer, the refrigerator, the electric oven, the mixer, the toaster, the washing machine, the water purifier, the motor pump, the room impeller and the expeller, the exhaust fan, the doorbell, and so many others.

In this progressive age, most of the sectors like the agricultural, the industrial, the medical, and other sectors all depend upon electricity.

It is electricity that runs the tube wells, the factories, and mills, the ECG, EEG and other machines, the printing presses, etc. The big rolling machines and the large turbines are all run with electricity. Now, electricity is used in running trains, trams and even buses at some places.

The lightning in the sky is a kind of electricity that takes place when positively and negatively charged clouds come close to each other.

Electricity is produced in several ways such as hydraulic pressure of cataracts and waterfalls which run powerful turbines, solar energy, windmills, nuclear energy, etc.

Electricity has made this civilization what it is. It is under electric light that we can read and write and see a movie in a cinema or watch a T.V. serial or a match.

If there were no electricity, the age of books and computers would be over. There would be no education and hence no education. Even food would be a problem and a large population would die of hunger.

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Essay on Uses of Electricity

Students are often asked to write an essay on Uses of Electricity in their schools and colleges. And if you’re also looking for the same, we have created 100-word, 250-word, and 500-word essays on the topic.

Let’s take a look…

100 Words Essay on Uses of Electricity

Introduction.

Electricity is a form of energy resulting from charged particles. It powers our modern world, making life easier and more efficient.

Electricity is used at home for lighting, cooking, and running appliances like refrigerators, televisions, and computers.

School Uses

In schools, electricity powers lights, computers, and lab equipment. It aids in teaching and learning.

Industrial Uses

Industries use electricity to run machines, which manufacture goods. It’s crucial for production and development.

Medical Uses

In medicine, electricity powers life-saving equipment like ventilators and MRI machines.

Electricity has countless uses, making it a vital part of our daily lives.

Also check:

Paragraph on Uses of Electricity

250 Words Essay on Uses of Electricity

Electricity, a form of energy resulting from the existence of charged particles, has become an indispensable part of modern life. It powers our homes, drives our industries, and fuels technological advancements, profoundly impacting every aspect of human existence.

Domestic Use

In homes, electricity is used for lighting, operating appliances, and maintaining comfortable temperatures. It powers our lights, refrigerators, televisions, computers, and air conditioners. It also enables the use of smaller gadgets like electric toothbrushes, vacuum cleaners, and microwaves.

Industrial Use

Industries heavily rely on electricity for operating machinery and automated systems. It powers assembly lines, heavy machinery, and tools, increasing efficiency and productivity. Electricity also enables the use of advanced technologies like robotics and artificial intelligence in industries.

Medical Use

In the medical field, electricity is vital for operating life-saving equipment and advanced diagnostic tools. From MRI machines to heart-lung machines, electricity plays a crucial role in diagnosing and treating diseases.

Technological Use

Electricity fuels technological advancements. It powers our computers and servers, which form the backbone of the internet. It also enables the development and use of electric vehicles, promoting sustainable transportation.

In conclusion, electricity is a vital component of modern life, driving domestic, industrial, medical, and technological progress. As we continue advancing, our dependence on this versatile form of energy will only increase, underlining the need for sustainable and efficient electricity generation and distribution.

500 Words Essay on Uses of Electricity

Introduction to electricity.

Electricity, a form of energy resulting from the existence of charged particles, has become an indispensable part of modern society. Its discovery and subsequent harnessing have paved the way for advancements in numerous fields, from technology to healthcare. This essay explores the diverse uses of electricity in various sectors of contemporary life.

Electricity in Everyday Life

Electricity permeates every aspect of our daily lives. We use it for lighting our homes, powering our appliances, and running our devices. Our dependence on electricity extends beyond the domestic sphere. It fuels public transportation systems, keeps traffic lights functional, and ensures that our cities never sleep.

Electricity in Technology and Communication

In the realm of technology and communication, electricity has brought about a paradigm shift. It powers our computers, smartphones, and the internet, connecting us with the world. It enables data storage and retrieval, facilitating the creation of vast digital libraries and databases. Moreover, electricity drives technological innovations, from AI and machine learning to electric vehicles and renewable energy solutions.

Electricity in Industry

The industrial sector heavily relies on electricity for a multitude of processes. Manufacturing units use it to operate machinery and tools, ensuring efficiency and precision. Electricity also powers automation systems, which streamline production, reduce human error, and increase productivity. In the logistics sector, electricity ensures the smooth operation of conveyance systems and storage facilities.

Electricity in Healthcare

The healthcare sector has been revolutionized by the advent of electricity. It powers life-saving equipment like defibrillators, ventilators, and dialysis machines. Diagnostic tools such as X-ray machines, MRIs, and CT scanners also rely on electricity. Furthermore, electricity enables telemedicine, allowing healthcare professionals to provide remote care and consultation.

Electricity in Research and Education

Electricity plays a pivotal role in research and education. It powers laboratories, enabling scientists to conduct experiments and make groundbreaking discoveries. In education, electricity has enabled the shift towards digital learning, with online platforms, virtual classrooms, and digital resources becoming increasingly prevalent.

Challenges and Future Prospects

Despite its widespread use, electricity poses several challenges. Its generation often involves the burning of fossil fuels, contributing to environmental pollution and climate change. However, the increasing focus on renewable energy sources promises a more sustainable future. Solar, wind, and hydroelectric power are emerging as viable alternatives, offering the prospect of clean, sustainable electricity.

In conclusion, electricity is the lifeblood of modern society, driving progress in various sectors. While it poses environmental challenges, the shift towards renewable energy sources promises a sustainable future. As we move forward, our reliance on electricity is likely to increase, underscoring the need for sustainable practices and innovative solutions.

That’s it! I hope the essay helped you.

If you’re looking for more, here are essays on other interesting topics:

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Essay on Save Water and Electricity for Children and Students

Table of Contents

Water and electricity are the two important necessities of today’s world. A human settlement cannot be imagined without the two of these basic amenities, but ironically the world is losing out fast on both of them. Though, water constitutes over 70% of earth’s mass; only 1% of it is fresh water that we use for our everyday works. On the other hand, growing population and the capacity to purchase electrical equipments have increased the demand for electricity; although, the electricity production capacity hasn’t improved much. There isn’t any feasible solution in view to counter this crisis, except to save water and electricity by whatever means possible. Any effort in this regard must be collectively thought and executed. It is our duty to save these two prime resources for our future generation.

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Long and Short Essay on Save Water and Electricity in English

We have provided below short and long essay on save water and electricity in English.

The essays have been written in simple yet effective English language so that they can be easily remembered and presented when needed.

After going through these save water save electricity essays you will know the importance of water and electricity conservation, how to teach students about water and electricity consumption, tips to save water and electricity etc.

These ‘short and long’ save water and electricity essay will be helpful in your school/college events of speech giving, essay writing or debate.

Short Essay on Save Water and Electricity – Essay 1 (350 words)

Introduction

Without water there is no life. Even desert dwelling fauna and flora need some measure of water to survive and thrive. Yet, most of us don’t think twice about leaving water running from a tap or polluting the rapidly diminishing sources of fresh water. This ignorance and inaction has resulted in a growing crisis – the possibility that we will run out of drinkable water in the near future.

The situation is slightly different when it comes to electricity. Electricity is a modern discovery but in just over a century it has become a mainstay in our existence. We use electricity for pretty much everything – from lighting up our homes to running machinery and even helping us come up with new technological innovations. However, the sources that provide us energy are non-renewable resources such as natural gas and coal. Sooner or later, we are going to run out of them.

Why we should Save Water and Electricity

There are plenty of reasons to save both water and electricity and some of them are very similar. First of all, from the individual’s point of view, saving these two resources means saving money. It’s simple – when you save water, your water bill isn’t high and the same principle works for electricity.

Second, conserving both is good for the environment. Less use of energy means that fewer fossil fuels are burnt and less pollution from that burning is released into the atmosphere. Conserving water ensures that we don’t deplete our sources of fresh water; more importantly, we don’t pollute water with pesticides and harmful chemicals that leave fresh water undrinkable and harm ecosystems that rely on that water.

Third, while electricity is generated using natural resources, water is a natural resource. Conserving both leads to conservation of resources that we are rapidly running out of and that are non-renewable.

Both water and electricity are essential to our lives. Without water, there will be no life. Without electricity, most of our daily necessities and needs will be unattainable. However, the stress on both these resources and the amounts that are being used need to reduce or soon there won’t be enough water or electricity to go around.

Essay on Importance of Saving Water and Electricity – Essay 2 (400 words)

There are two resources that are essential to a thriving life – water, which is required to keep you alive and healthy and electricity which runs so much of our daily life that we would be quite lost without it. Both these resources occur in nature in a way. Water is directly found in water bodies, ice fields and glaciers. Electricity is generated using coal or natural gas, both of which can be extracted from the earth by mining.

Importance of Water and Electricity Conservation

Although both resources occur more or less naturally, both are finite. Only around 3.5 percent of all the water on the planet is fresh water and only one percent is accessible to us. Similarly, coal and natural gas deposits have only a certain amount of these resources. The major problem here is that the world’s population is increasing by leaps and bounds and the demand for both these resources is extremely high.

Since these resources are finite, the demand far outstrips the supply. It is even believed by many scientists and geologists that unchecked, we will consume so much of both that we will soon run out. The consequences of this are quite frightening. Without electricity, our modern way of life will collapse since so much of it depends on energy. Without water, we ourselves won’t survive very long.

Another point here is that we are polluting the water bodies that supply us and damaging the environment, through water pollution and through the mining practices we use to extract coal and natural gas. This means that not only are additional sources of fresh water unsafe for human consumption but also the environment is under attack. Under this kind of abuse, our environment will soon not be able to sustain us.

It becomes obvious then that these resources need to be used judiciously, if we are to have any hope of making them last. We need to realize the problem of shortage before it occurs and do whatever we can to save electricity and water. In addition, we need to spread awareness so that more and more people take steps towards conservation.

In the end, it is up to us to use measures that will ensure availability of water and electricity for a longer time. If charity begins at home, so does conservation. We need to take small, simple and consistent steps to see to it that these precious resources aren’t wasted.

Essay on Urging Students to Save Electricity and Water – Essay 3 (450 Words)

Water and electricity are considered basic resources to live in modern times. Water is the most important because without it there literally would be no life. Electricity also holds a place of grave importance because most of modern existence is powered by it. However, there are only so many sources of fresh water in the world. Similarly, there is only a limited amount of fossil fuels that can be used to generate electricity. These two resources are essentially finite. Our population, on the other hand, keeps growing every day. As this happens, the demands for these two resources increases but their sources become scarce.

Unfortunately, we are so used to having an abundance of both that we have grown careless. Every day in many ways we waste huge amounts of these resources without thinking twice. For many of us it is habit that we have cultivated from childhood. Ensuring that the next generation does not follow the same wasteful habits is now a priority.

Teaching Students about Water and Electricity Conservation

We need to ensure that the urgency of dwindling natural resources, the reality of environmental damage and the immediate need for conservation is something that new generations understand very well. The best way to do so is by educating students. Students need to be aware of this because they are the agents of change. They are the ones who gain the latest knowledge and they are the ones idealistic enough to utilize it for everyone’s betterment. For this reason, environmental sciences need to be taught in every grade.

Students are learning as they grow up that these resources are essential to our existence. They’re also learning that the same resources are finite. Students more open to new ideas and thoughts. Therefore, when shown the impact of the lack of resources and conservation of those same resources, students are much more likely to follow steps for conservation. They are also more likely to involve their families and communities in the effort to conserve these two resources. Most importantly, though, students have inventive minds and are most likely to come up with ideas that can help us use less or conserve more of water and electricity.

If we want generations to grow up with conservation as one of their values, it is very important that we teach them this value right from the beginning. The earlier we do so, the more well embedded these values will be. In our efforts to conserve electricity and water students must be the forerunners. Only then will we see effective change.

Essay on Conservation of Water and Electricity – Essay 4 (600 words)

Water and electricity are two resources we absolutely need – water because it is essential to life and electricity because the modern world would not be possible without it. Unfortunately, these resources are finite; there is only so much fresh water in the world and electricity is generated from fossil fuels which are a dwindling natural resource. What makes matters worse is that the global population increases day by day making the demand for these resources higher. In order to ensure that future generations have enough of both resources, we need to conserve them.

Conservation of Water

There is no denying the fact that we need water to survive. Some studies have speculated that the human body can go only three days without water. This isn’t surprising since sixty percent of our body is made up of water. However, this is also the resource that gets wasted the most. We leave taps running, don’t pay attention to leaks and pollute the sources of fresh water we so desperately need. It is becoming imperative that we take steps to reverse this or we will soon lose this resource completely.

There are certain steps all of us can take on an individual level to help conserve water. Some of them are:

When you shave or brush your teeth in the morning, don’t leave the water running. By turning of the tap you can save around nineteen litres of water a day.
You can buy water conserving adapters and have them fitted to your taps. They will halve the flow of water from the taps.
Fill up the sink to the halfway mark with water when you wash the dishes, instead of using running water. You can save around thirty litres every fifteen minutes this way.
Make sure that all leaks are repaired properly. Thirty litres of water a day is lost through leaks.
Shower instead of taking a bath in the bathtub. The difference between the latter and the former is one hundred and ten litres.

Conservation of Electricity

Electricity plays such a major role in our lives that we feel the pinch the moment power gets cut. Pretty much every appliance we use in the house is dependent on electricity. However, when we leave these things connected and running even though we are not using them, we end up wasting huge amounts of electricity.

Some steps we can take to conserve electricity are:

Switch off lights and fans when we leave a room.
Use energy-efficient bulbs rather than the regular ones. They are brighter and use much less electricity.
When not using an appliance such as a washing machine or television, switch them off from where they’re connected into the socket.
When not charging electronic devices, make sure to turn off the chargers or disconnect them.
In summer, find times when you can open up the windows for air circulation and cooling instead of switching on the air conditioner.

There are many small ways in which we can conserve electricity and water. When we take these steps not only will they reduce the amount of water or energy you need to use but also lower the bills you have to pay for them. Making these steps a habit will serve everyone better in the long run.

Essay on Saving Water and Electricity: Small Changes, Big Rewards – Essay 5 (800 words)

Water is an absolutely essential resource for us. This is not surprising considering the fact that more than sixty percent of our bodies are made up of water. In fact, water is more than a mere resource; it is life. Without water, there would be no life on this planet. Even today, if we are deprived of water, we would die out very quickly.

Electricity doesn’t hold the same importance as water in the overall scheme of things; we would certainly not die without it. It is an invention of the modern era, however, and everything we use in these times is powered by electricity. Without electricity our entire way of life will be set back by at least five hundred years.

Saving Water and Electricity

Considering how important the two resources are – one to our survival and one to our way of life – there can be no doubt about the fact that everyone needs these resources. The problem is that since the population of the earth is growing every day, the demand for these resources is also increasing. However, these resources are not infinite.

Indeed, even though water covers seventy percent of the planet, only around two point five percent is fresh water and one point five percent of that is trapped in ice fields and glaciers. We only have access to the remaining one percent which can be found in lakes, ponds and rivers and in underground pockets. It is this groundwater that we usually tap into. Unfortunately, the levels of water under the earth are either diminishing because of the enormous demand or are contaminated due to chemicals that seep into the ground. In short, we are running out of water.

Electricity is mostly generated using fossil fuels such as natural gas and coal. These are naturally occurring substances generally found in the earth or refined from crude deposits. Since modern life runs on electricity supplies, the demand for it is high and increasing every day. The increasing population requires more electricity to be generated but the resources that generate this electricity are finite. To put it simply we are running out of coal and petroleum which yields natural gas.

This is why it is imperative that we save these resources. If we do not take steps now, soon we may no longer have them at our disposal.

Tips to Conserve Water and Electricity

In light of this looming crisis, it becomes every individual’s responsibility to conserve these resources. Fortunately, there are quite a few small steps we can take to save water and electricity. These small steps can have a huge impact if the majority of people follow them. There are some simple hacks that we can utilize to conserve both.

When washing clothes in a washing machine, ensure that you have put in a full load of clothes so that you don’t need to run it multiple times. This saves both water and electricity.
Instead of using the dryer function, hang your clothes out to dry. This simple step can save you a lot of electricity.
Use bio-friendly soap while washing clothes to ensure that the run-off doesn’t pollute sources of fresh water.
When leaving a room, ensure that electrical appliances are not running needlessly. Switch them off.
When going to take a shower, collect the cold water that first comes out in a bucket. You can put this water in jugs for use around the house.
Unplug any chargers that are not charging a device.
In summers, if the heat allows it, turn off the air conditioner and instead open up some windows. This ensures circulation of air, keeping your home cool. At the same time, it lessens the use of electricity and keeps your power bills lower.
Switch from regular bulbs to fluorescent bulbs. They use a fraction of the electricity that a normal bulb uses and are brighter.
Instead of washing dishes under running tap water, fill the sink halfway and wash dishes in that water.
Don’t leave the tap running while brushing your teeth or performing any other ablutions.
Locate any leaks in the plumbing and have them repaired immediately. You can save close to thirty litres of water this way.

These are some of the tips that you can utilize every day in your home and even at work to conserve water and electricity. In doing so, not only will these resources last longer, but also reduce the carbon footprint of your home or work. In all ways, this is a win-win scenario for you and for the environment.

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Essay on Save Electricity for Class 6

Electricity plays a significant role in our daily lives, and we cannot imagine our life without electricity. However, electricity is often being used up unnecessarily to a great extent without keeping in mind its conservation and future use. It is vital to start saving electricity so that future generations can use it as well.

We are providing two essay samples for students of class 3 on the topic ‘Save Electricity’ for reference.

Short Essay on Save Electricity of 100 Words

Electricity is one of the best gifts of science to humankind. Electricity has made our lives easier to such an extent that at this point life without electricity is impossible even to imagine. Electricity is the source of heat, light, and various other comforts.

However, people seem to take this blessing for granted and tend to misuse electricity. Often electric applications are kept switched on even when not in use—switching them off when not in use will help in saving thousands of watts.

Saving electricity is very important. We should conserve electricity for our future generations so that they can use it as well.

Engage your kid into diverse thoughts and motivate them to improve their English with our Essay for Class 6 and avail the Simple Essays suitable for them.

Long Essay on Save Electricity of 150 Words

Electricity is necessary in almost every sphere of life in today’s world. Electricity has supplied all types of energies to the man in order to improve not only his everyday life but also social amenities and scientific inventions.

Saving electricity needs people to become more cautious about their use of this resource.

Electricity can be saved by using alternative sources of energy, such as natural light during the day instead of using blubs and tube lights.

Old appliances usually consume more watt than required, hence replacing old appliances with new ones helps in staying energy efficient. Children must be encouraged not to spend much time watching tv instead go outside and play.

Many people often use solar panels in their houses which also help in saving a lot of electricity, reducing the large electricity bills gradually. Saving electricity is the only way left to conserve it, and it requires the combined efforts of all human beings.

10 Lines on Save Electricity in English

Electricity is needed in every aspect of life, and it is impossible for modern without electricity.
Electricity serves as the backbone of modern society.
Our lives without electricity will go back to the primitive age.
Saving electricity is necessary to be able to survive on this planet efficiently.
Switch off electrical appliances when they are not in use.
During the day time, using natural light is better than preferably using tube lights or lamps to light up the room.
Alternative sources of electricity must be explored to meet the gap between its demand and supply.
People can choose to shift from desktops to laptops as laptops consume less energy than a desktop.
When the weather is pleasant, people should keep the window open and enjoy the breeze by switching off the fan.
Everyone should take every step that they can to conserve electricity sources for the future generation.

Frequently Asked Questions on Save Electricity Essay

Question: Why is electricity essential?

Answer: Electricity is vital because it is widely used in every aspect of life. Electricity facilitates various technological advancements supporting a wide range of products and services. It enhances our quality of life and stimulates economic productivity.

Question: Why is saving electricity necessary?

Answer: Saving electricity is necessary because it is primarily produced from non-renewable sources like water and coal. We need to save the resources for future generations to use it.

Question: What resources are used for generating electricity?

Answer: Coal and waiter are used mainly for generating electricity. It is also produced from various other sources like solar and nuclear energy but in small quantities.

Save Water Save Life Essay for Class 3 Students

Introduction.

Among the different kinds of practices and exercises in the English subject, essay writing is an essential section where every student reflects his/her imagination power and combines words to write a piece. Writing a short piece on a particular topic shows how deeply a student can think and can find the exact words related to the context. This essay written by the experts will aid in developing critical thinking and teach students how to write a beautiful essay on the above-mentioned topic: Save Water, Save Life.

Essay 1: Save Water Save Life

Every living being needs water and air to stay alive. Water is very necessary for the existence of life on our planet. The major part of our planet’s surface is covered with water. Every animal or plant is dependent on the source of water nearby. Land animals and plants depend on freshwater. Living organisms need water to maintain the vital balance in their bodies.

We use potable water or drinkable water for different purposes. It is the most important factor for human civilization to settle down. We have read in the history lessons that the old civilizations developed around the river banks. Our map also shows that the population is denser alongside the river banks. We also use water for cooking, cleaning, washing, etc every day in our home. It is also used for different processes in the factories for making goods. Water is also used for growing crops and other food sources.

Water has been the prime reason for choosing a particular location to settle down since the dawn of civilization. At the present time, we are facing a lot of trouble due to the misuse of water resources. Saving water resources is very important. The major part of the urban cities in the world is facing a huge water crisis due to excessive use of freshwater resources. The lack of a proper water supply can damage our well-being. Water sources are reducing every day due to landfills and construction. The groundwater level has gone down. Rainwater is not being collected in the water table underground. The factories are dumping their waste into the rivers and harming the animals and plants. This dirty water reaches the sea and damages marine wildlife.

Most of the populated cities are facing a huge water crisis. We need to conserve water to meet the demand. Many steps are being taken to conserve water. Students are learning how to save water and are promoting the idea. Factories are recycling waste to save the rivers. People should be aware of the benefits of water and should stop wasting it. Schools and students should create awareness and let everyone realize the importance of water in our lives. We need to learn the benefits of water and use it properly in the future. We need safe drinking water to survive. We also need to preserve the wildlife in the marine and freshwater sources. It is time to learn how to use water properly and stop misusing it.

Essay 2: Save Water, Save Life

Water is the most important component of our lives as human beings. Water is used in many important ways in our day-to-day lives. Due to carelessness we human beings often waste a lot of water. As we all use and share water with negligence, we unintentionally waste it. Water is used in many ways, the most important one is for drinking. If we don't provide an adequate amount of water to our body, we might fall sick and have allergies and disease due to lacking drinking water.

Cleanliness is the second most important function that water plays in our lives. If we do not wash our bodies properly, we might get dirty and smell bad daily. We must not only wash but also our surroundings too. Keeping our living place tidy and fresh will result in a clean atmosphere and a fresh breathing system. Water is also very useful during a fire breakout. When the fire is out of control, splashing water of any temperature can calm the fire.

Water is useful for growing plants from which we get our daily food. If there is no water, it means no growth of plants, and eventually no food. Farmers need extra tons of water to water their saplings and graze their fields to prepare fresh vegetables, fruits, tea, nuts etc. If we carelessly use water, we will not be able to enjoy these beautiful things. Saving water saves lives. There are many storage techniques we can adopt to store water as much as possible for future emergencies.

There are a few ways to prevent water wastage. Some of them include using water properly and only when in use. If there are leaking taps, mend them right away to avoid wastage or if not possible immediately then keep buckets or mugs under them to store as much as possible. During rain, prepare a rain harvest pit to collect rainwater at least. Use body soaps instead of gels or creams to prevent excess water usage. Use water in a way that is needful yet adequate. In this way, we can try to save water and eventually it will help in securing human life.

Water wastage has become one of the most recurring problems in our world. Careless usage, excessive wastage and pollution of water have harmed the balance of the ecosystem drastically. If there is no chance now, humanity is set to suffer as a consequence. To ensure strict compliance with saving water and to avoid using it as a luxury rather than a commodity, humans should be wary and must adopt effective rules in conserving water. Students can go through these essays on saving water by Vedantu to understand the importance of this topic.

FAQs on Save Water Save Life Essay for Class 3 Students

1. Why ‘Save Water Save Life’ essay is important?

Students of Class III should research and learn the importance of water and find out how to save it. Water is important for every human settlement to survive. Every city is suffering from the misuse of freshwater resources. Writing an essay on this topic will help the students go deeper into the topic and learn the importance of water. Water pollution and depleting levels of resources are two of the biggest threats humans are suffering. In order to maintain the balance of the ecosystem, students need to learn how to save water. This essay will help them to understand the root level.

2. How this essay will help a student score?

The composition of this essay is formulated by the experts of Vedantu. The proper formatting and inclusion of the facts will help the students learn about the current scenario. It will also help them to configure and write an essay on this topic all by themselves. Following the given format and content, a student will be able to grab the concept of how to formulate an essay methodically and give his/her best in the exams. The experts also have maintained the level of English and vocabulary for the students of the respective class.

3. What are the main points to keep in mind when writing an essay?

The major points the students have to keep in mind when they write an essay are:

Their essays have to follow a logical structure. No matter which class the student is in, he/she should follow a coherent structure that will explain their topic in an uncomplicated way.

There should be appropriate paragraph spaces. Every essay has to have paragraphs separated for easy readability. If all the words are written without breaking paragraphs, the teacher might find it difficult to grasp the overall intention behind the topic.

4. How does essay writing help students?

The art of essay writing is simple. The student has to follow a set of simple rules and write on any topic given to them. They can also choose their own topic. By writing essays, students are able to express themselves in a healthy way. They are able to formulate personal opinions and also find ways to write in such a way that they can persuade their readers through words. Essay writing requires hard work but it is also equally rewarding as well.

5. When should I start learning about essay writing?

It is advisable to start essay writing from an early age. This way, the student develops an effective writing habit which improves as they grow up. By starting off early in school, students can pick general and non-controversial topics for brushing up their writing skills. As they progress in each class, they will ultimately be skilled enough to write about topics that need maturity and attention to express. Therefore, it is effective to start writing essays in the early classes and gradually advance to the higher classes.

Kids-learning • Class 3

Mercedes-Benz

Mercedes will finally unveil its ‘unrivaled’ electric g-class later this month.

The G-Wagon is finally going all-electric. Mercedes-Benz is unveiling its long-awaited electric G-Class at the Beijing Motor Show later this month. Mercedes has been teasing the electric 4×4 since the concept version debuted in 2021.

Mercedes is unveiling the electric G-Class on April 24

Mercedes first revealed the G-Class EQG concept at the Munich Motor Show in September 2021. Since then, Mercedes has been previewing the concept for months.

The electric 4×4 made an appearance at CES 2024 in January. Ahead of its unveiling, CEO Ola Källenius took the electric G-Class extreme weather testing near the Arctic Circle (see the video below).

Since 1979, the Mercedes G-Class has been one of the original off-roaders. Mercedes G brand managing director Emmerich Schiller said the company “didn’t want to compromise on capabilities.”

“From the start, it was decided the electric G-Class should be at least as good as the internal-combustion-engine model both on road and off road,” Shiller explained. The concept featured a quad-motor powertrain for ultimate off-road performance.

Like BYD’s luxury Yangwang U8 , launched last September in China and earlier this year in Europe, the electric G-Class can do “tank turns.”

Shiller said the quad-motor system, also used by Rivian, aims to give the electric G-Class “an unrivaled combination” of off-road performance with the on-road luxury and refinement G customers expect.

Despite the previews, Mercedes has yet to reveal the final details. Mercedes said the prototype would consume between 28.7 and 30.3 kWh per 62 miles for an efficient rating of 2 to 2.2 kWh.

With a roughly 100 kWh battery, that would suggest the electric G-Class would have around 200 to 220 miles range.

According to Autocar , the new electric G-Class will go by the G580 with EQ Technology. Shiller hinted it will feature different models with various outputs, including a flagship AMG.

Top comment by BCV

I’m looking forward to final details on this. Not because I can afford it, but because it’s supposed to be the first production vehicle with a silicon anode battery.

This will give a good indication of what we can expect for the next generation of EV’s in regards to energy density and charging speeds.

Mercedes’ G brand boss said it was too early to announce the range, but the four electric motor system could benefit significantly from energy regeneration, both on and off-road.

The battery is sealed to enable wading through deep water. With an additional layer of carbon fiber-reinforced polymer compound, the casing is “designed to protect the battery at all times.” Although the final figure is not confirmed, Shiller confirmed it will weigh under 7,700 lbs (3500 kg).

Like its predecessors, the electric G-Class is built to conquer the iconic Schoeckl. Before it goes into production, the EV will complete 300 runs up and down the 3.4-mile trail to ensure it is equipped.

Mercedes is also planning a smaller electric G-Wagon . With a current G-class model starting at $143,000, a smaller model could be offered at a lower price.

FTC: We use income earning auto affiliate links. More.

Peter Johnson is covering the auto industry’s step-by-step transformation to electric vehicles. He is an experienced investor, financial writer, and EV enthusiast. His enthusiasm for electric vehicles, primarily Tesla, is a significant reason he pursued a career in investments. If he isn’t telling you about his latest 10K findings, you can find him enjoying the outdoors or exercising

NCERT Solutions
NCERT Class 12
NCERT 12 Physics
Chapter 3: Current Electricity

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity

Ncert solutions for class 12 physics chapter 3 – free pdf download.

The NCERT Solutions for Class 12 Chapter 3 Current Electricity is an essential resource material that is needed by all students to score good marks in Class 12 Physics CBSE examinations and entrance examinations. The NCERT Solutions for Class 12 Physics PDF provided here can be downloaded for free. Students can get answers to the questions in the textbook, along with exemplary problems, numericals on current electricity Class 12 PDF, worksheets and exercises.

Current Electricity NCERT Solutions for Class 12 Physics aid in preparing Physics Class 12 Chapter 3 notes and will come in handy during revisions. These NCERT Solutions are created by subject experts according to the latest CBSE Syllabus 2023-24 and its guidelines. Also, the solutions are available with online and offline download options. This makes these NCERT Solutions for Class 12 Physics the best resource to prepare for the Physics examination.

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Class 12 Physics NCERT Solutions Current Electricity Important Questions

Question 3.1:

The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery?

Answer 3.1:

In the given question,

The EMF of the battery is given as E = 12 V

The internal resistance of the battery is given as R = 0.4 Ω

The amount of maximum current drawn from the battery is I

According to Ohm’s law,

Rearranging, we get

Substituting values in the above equation, we get

Therefore, the maximum current drawn from the given battery is 30 A.

Question 3.2:

A battery of EMF 10 V and internal resistance 3 Ω is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

Answer 3.2 :

The EMF of the battery ( E = 10 V)

The internal resistance of the battery ( R = 3 Ω)

The current in the circuit ( I = 0.5 A)

Consider the resistance of the resistor to be R .

The current in the circuit can be found out using Ohm’s Law as,

Rewriting the above equation, we get

Consider the Terminal voltage of the resistor to be V.

Then, according to Ohm’s law,

Substituting values in the equation, we get

V = 0.5 × 17

Therefore, the resistance of the resistor is 17 Ω, and the terminal voltage is 8.5 V.

Question 3.3:

a) Three resistors 1 Ω, 2 Ω, and 3 Ω are combined in series. What is the total resistance of the combination?

b) If the combination is connected to a battery of emf 12 V and negligible internal resistance, obtain the potential drop across each resistor.

Answer 3.3:

a) We know that resistors r 1 = 1 Ω , r 2 = 2 Ω and r 3 = 3 Ω are combined in series.

The total resistance of the above series combination can be calculated by the algebraic sum of individual resistances as follows:

Total resistance = 1 Ω + 2 Ω + 3 Ω = 6 Ω

Thus calculated Total Resistance = 6 Ω

b) Let us consider I to be the current flowing the given circuit

The emf of the battery is E = 12 V

The total resistance of the circuit ( calculated above ) = R = 6 Ω

Using Ohm’s law, the relation for current can be obtained as

Therefore, the current calculated is 2 A

Let the Potential drop across 1 Ω resistor = V 1

The value of V 1 can be obtained from Ohm’s law as :

V 1 = 2 x 1 = 2 V

Let the Potential drop across 2 Ω resistor = V 2

The value of V 2 can be obtained from Ohm’s law as:

V 2 = 2 x 2 = 4 V

Let the Potential drop across 3 Ω resistor = V 3

The value of V 3 can be obtained from Ohm’s law as:

V 3 = 2 x 3 = 6 V

Therefore, the potential drops across the given resistors r 1 = 1 Ω , r 2 = 2 Ω and r 3 = 3 Ω are calculated to be

V 2 = 2 x 1 = 4 V

V 3 = 2 x 1 = 6 V

Question 3.4:

a) Three resistors 2 Ω, 4 Ω and 5 Ω are combined in parallel. What is the total resistance of the combination?

b) If the combination is connected to a battery of emf 20 V and negligible internal resistance, determine the current through each resistor, and the total current drawn from the battery.

Answer 3.4:

A ) Resistors r 1 = 2 Ω , r 2 = 4 Ω and r 3 = 5 Ω are combined in parallel

Hence the total resistance of the above circuit can be calculated by the following formula:

Therefore, the total resistance of the parallel combination given above is given by:

B ) Given that emf of the battery, E = 20 V

Let the current flowing through resistor R 1 be I 1

I 1 is given by :

Let the current flowing through resistor R 2 be I 2

I 2 is given by :

Let the current flowing through resistor R 3 be I 3

I 3 is given by :

Therefore, the total current can be found by the following formula :

I = I 1 + I 2 + I 3 = 10 + 5 + 4 = 19 A

therefore the current flowing through each resistor is calculated to be :

Therefore, the total current is I = 19 A

Question 3.5:

At room temperature (27.0 °C) the resistance of a heating element is 100 Ω. What is the temperature of the element if the resistance is found to be 117 Ω, given that the temperature coefficient of the material of the resistor is 1.70 × 10 –4 °C –1 .

Answer 3.5:

Given that the room temperature, T = 27 ° C

The heating element has a resistance of R = 100 Ω

Let the increased temperature of the filament be T 1

At T 1 , the resistance of the heating element is R 1 = 117 Ω

Temperature coefficient of the material used for the element is 1.70 x 10 – 4 C – 1

α = 1.70 x 10 -4 C – 1

α is given by the relation ,

T 1 = 1027 ° C

Therefore, the resistance of the element is 117 Ω at T 1 = 1027 ° C

Question 3.6:

A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0 × 10 –7 m 2 , and its resistance is measured to be 5.0 Ω. What is the resistivity of the material at the temperature of the experiment?

Answer 3.6:

Given that the length of the wire, L = 15 m

The area of cross-section is given as , a = 6.0 x 10 – 7 m 2

Let the resistance of the material of the wire be, R, i.e., R = 5.0 Ω

The resistivity of the material is given as ρ

Therefore, the resistivity of the material is calculated to be $\begin{array}{l}2 \times 10 ^{ – 7 }\end{array} $

Question 3.7:

A silver wire has a resistance of 2.1 Ω at 27.5 °C, and a resistance of 2.7 Ω at 100 °C. Determine the temperature coefficient of resistivity of silver.

Answer 3.7:

Given that temperature T 1 = 27.5 ° C

Resistance R 1 at temperature T 1 is given as :

R 1 = 2.1 Ω ( at T 1 )

Given that temperature T 2 = 100 ° C

Resistance R 2 at temperature T 2 is given as :

R 2 = 2.7 Ω ( at T 2 )

Temperature coefficient of resistivity of silver = α

Therefore, the temperature coefficient of resistivity of silver is $\begin{array}{l}0.0039 ^{\circ} C ^{ – 1 }\end{array} $

Question 3.8:

A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2.8 A. What is the steady temperature of the heating element if the room temperature is 27.0 °C? Temperature coefficient of resistance of nichrome averaged over the temperature range involved is 1.70 × 10 –4 °C –1 .

Answer 3.8:

In the given problem,

The supply voltage, V = 230 V

The initial current drawn, I 1 = 3.2 A

Consider the initial resistance to be R 1 , which can be found by the following relation:

Substituting the values, we get

Value of current at steady state, I 2 = 2.8 A

Value of resistance at steady state = R 2

R 2 can be calculated by the following equation:

The temperature coefficient of nichrome averaged over the temperature range involved is 1.70 x 10 – 4 ° C – 1

Value of initial temperature of nichrome , T 1 = 27.0 ° C

Value of steady-state temperature reached by nichrome = T 2

This temperature T 2 can be obtained by the following formula:

T 2 = 840.5 + 27 = 867.5 ° C

Hence, the steady temperature of the heating element is 867.5 ° C

Question 3.9 :

Determine the current in each branch of the network shown in the figure:

NCERT-Solutions-for-Class-12-Physics-Chapter-3-Current-Electricity Question 9

Answer 3.9 :

The current flowing through various branches of the network is shown in the figure given below:

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 9 Solution

Let I 1 be the current flowing through the outer circuit

Let I 2 be the current flowing through AB branch

Let I 3 be the current flowing through AD branch

Let I 2 – I 4 be the current flowing through branch BC

Let I 3 + I 4 be the current flowing through branch DC

Let us take closed-circuit ABDA into consideration, we know that potential is zero.

i.e , 10 I 2 + 5 I 4 – 5 I 3 = 0

2 I 2 + I 4 – I 3 = 0

I 3 = 2 I 2 + I 4 . . . . . . . . . . . . . . . . . . . . . . eq ( 1 )

Let us take closed circuit BCDB into consideration, we know that potential is zero.

i.e., 5 ( I 2 – I 4 ) – 10 ( I 3 + I 4 ) – 5 I 4 = 0

5 I 2 – 5 I 4 – 10 I 3 – 10 I 4 – 5 I 4 = 0

5 I 2 – 10 I 3 – 20 I 4 = 0

I 2 = 2 I 3 – 4 I 4 . . . . . . . . . . . . . . . . . . . . . . eq ( 2 )

Let us take closed-circuit ABCFEA into consideration, we know that potential is zero.

i.e , – 10 + 10 ( I 1 ) + 10 ( I 2 ) + 5 ( I 2 – I 4 ) = 0

10 = 15 I 2 + 10 I 1 – 5 I 4

3 I 2 + 2 I 2 – I 4 = 2 . . . . . . . . . . . . . . . . . . . . . . eq ( 3 )

From equation ( 1 ) and ( 2 ), we have :

I 3 = 2 ( 2 I 3 + 4 I 4 ) + I 4

I 3 = 4 I 3 + 8 I 4 + I 4

– 3 I 3 = 9 I 4

– 3 I 4 = + I 3 . . . . . . . . . . . . . . . . . . . . . . eq ( 4 )

Putting equation ( 4 ) in equation ( 1 ) , we have :

I 3 = 2 I 2 + I 4

– 4 I 4 = 2 I 2

I 2 = – 2 I 4 . . . . . . . . . . . . . . . . . . . . . . eq ( 5 )

From the above equation , we infer that :

I 1 = I 3 + I 2 . . . . . . . . . . . . . . . . . . . . . . eq ( 6 )

Putting equation ( 4 ) in equation ( 1 ), we obtain

3 I 2 + 2 ( I 3 + I 2 ) – I 4 = 2

5 I 2 + 2 I 3 – I 4 = 2 . . . . . . . . . . . . . . . . . . . . . . eq ( 7 )

Putting equations ( 4 ) and ( 5 ) in equation ( 7 ), we obtain

5 ( – 2 I 4 ) + 2 ( – 3 I 4 ) – I 4 = 2

– 10 I 4 – 6 I 4 – I 4 = 2

17 I 4 = – 2

Equation ( 4 ) reduces to

I 3 = – 3 ( I 4 )

I 2 = – 2 ( I 4 )

Therefore, current in each branch is given as :

In branch $\begin{array}{l}AB = \frac{ 4 }{ 17 } A\end{array} $

In branch $\begin{array}{l}BC = \frac{ 6 }{ 17 } A\end{array} $

In branch $\begin{array}{l}CD = \frac{ – 4 }{ 17 } A\end{array} $

In branch $\begin{array}{l}AD = \frac{ 6 }{ 17 } A\end{array} $

In branch $\begin{array}{l}BD = \frac{ – 2 }{ 17 } A\end{array} $

Total current $\begin{array}{l}= \frac{ 4 }{ 17 } + \frac{ 6 }{ 17 } + \frac{ – 4 }{ 17 } + \frac{ 6 }{ 17 } + \frac{ – 2 }{ 17 } = \frac{ 10 }{ 17 } A\end{array} $

Question 3. 10:

A ) In a meter bridge given below, the balance point is found to be at 39.5 cm from the end A, when the resistor S is of 12.5 Ω. Determine the resistance of R. Why are the connections between resistors in a Wheatstone or meter bridge made of thick copper strips?

B ) Determine the balance point of the bridge above if R and S are interchanged.

C ) What happens if the galvanometer and cell are interchanged at the balance point of the bridge? Would the galvanometer show any current?

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 10 Solution

Answer 3. 10:

( a ) Let L 1 be the balance point from end A,

Given that , L 1 = 39.5 cm

Given that resistance of the resistor S = 12.5 Ω

We know that condition for the balance is given by the equation:

Thus calculated the resistance of the resistor R, R = $\begin{array}{l}8.2 \Omega\end{array} $

(b) If R and S are interchanged, then the lengths will also be interchanged.

Hence, the length modifies to

l = 100 – 39.5 = 60.5 cm.

(c) If the galvanometer and the cell are interchanged, the position of the balance point remains unchanged. Therefore, the galvanometer will show no current.

Question 3.11:

A storage battery of emf 8.0 V and internal resistance 0.5 Ω is being charged by a 120 V dc supply using a series resistor of 15.5 Ω. What is the terminal voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?

Answer 3.11:

The EMF of the given storage battery is E = 8.0 V

The Internal resistance of the battery is given by r = 0.5 Ω

The given DC supply voltage is V = 120 V

The resistance of the resistor is R = 15.5 Ω

Effective voltage in the circuit = V 1

R is connected to the storage battery in series.

Hence, it can be written as

V 1 = V – E

V 1 = 120 – 8 = 112 V

Current flowing in the circuit = I, which is given by the relation,

We know that Voltage across a resistor R given by the product,

I x R = 7 × 15.5 = 108.5 V

We know that,

DC supply voltage = Terminal voltage + voltage drop across R

Terminal voltage of battery = 120 – 108.5 = 11.5 V

A series resistor, when connected to a charging circuit, limits the current drawn from the external source.

The current will become extremely high in its absence. This is extremely dangerous.

Question 3.12 :

In a potentiometer arrangement, a cell of emf 1.25 V gives a balance point at 35.0 cm length of the wire. If the cell is replaced by another cell and the balance point shifts to 63.0 cm, what is the emf of the second cell?

Answer 3.12:

Emf of the cell, E 1 = 1.25 V

The balance point of the potentiometer, l 1 = 35 cm

The cell is replaced by another cell of emf E 2 .

The new balance point of the potentiometer, l 2 = 63 cm

The balance condition is given by the relation,

Question 3.13 :

The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 × 10 28 m –3 . How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is 2.0 × 10 –6 m 2 and it is carrying a current of 3.0 A.

Answer 3.13 :

Given that Number density of free electrons in a copper conductor, n = 8.5 x 10 28 m – 3

Let the Length of the copper wire be l

Given , l = 3.0 m

Let the area of the cross-section of the wire be A = 2.0 x 10 – 6 m 2

The value of the current carried by the wire, I = 3.0 A, which is given by the equation,

I = n A e V d

e = electric charge = 1.6 x 10 – 19 C

Question 3.14:

The earth’s surface has a negative surface charge density of 10 –9 C m –2 . The potential difference of 400 kV between the top of the atmosphere and the surface results (due to the low conductivity of the lower atmosphere) in a current of only 1800 A over the entire globe. If there were no mechanism of sustaining atmospheric electric field, how much time (roughly) would be required to neutralise the earth’s surface? (This never happens in practice because there is a mechanism to replenish electric charges, namely the continual thunderstorms and lightning in different parts of the globe). (Radius of earth = 6.37 × 10 6 m.)

Surface charge density of the earth, σ=10 −9 cm −2 Potential difference between the top of the atmosphere and the surface, V= 400 kV Current over the entire globe, I=1800 A Radius of the earth, r=6.37×10 6 m Surface area of the earth, A=4πr 2

= 4 x 3.14 x (6.37×10 6 ) 2 =5.09×10 14 m 2

Charge on the earth’s surface, q=σA= 10 −9 x 5.09×10 14

= 5.09×10 5 C

Time taken to neutralize the earth’s surface, t = q/I

⟹t=5.09×10 5 /1800=283 s

Question 3.15:

(a) Six lead-acid type of secondary cells each of emf 2.0 V and internal resistance 0.015 Ω are joined in series to provide a supply to a resistance of 8.5 Ω. What is the current drawn from the supply and its terminal voltage? (b) A secondary cell after long use has an emf of 1.9 V and a large internal resistance of 380 Ω. What maximum current can be drawn from the cell? Could the cell drive the starting motor of a car?

(a) Emf of the secondary cells, ε = 2.0 V

Number of secondary cells, n = 6

Total EMF, E= nε= 6 x 2 = 12 V

The internal resistance of the secondary cells, r= 0.015 Ω

Resistance to which the secondary cells are connected, R = 8.5 Ω Total resistance in circuit R total = nr+ R = 6×0.015+8.5=8.59Ω

Current drawn from the supply, I=E/R total =12/8.59 = 1.4 A Terminal voltage, V= IR = 1.4×8.5=11.9 V

(b) Emf of the secondary cell, ε = 1.9 V

Internal resistance, r = 380 Ω Maximum current drawn from the cell,I =ε/r = 1.9/380=0.005A.

The current required to start a motor is 100 Amp. Here, the current produced is 0.005 A, so the starting motor of the car cannot be started with this current.

Question 3.16:

Two wires of equal length, one of aluminium and the other of copper have the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead power cables. (ρ Al = 2.63 × 10 –8 Ω m, ρ Cu = 1.72 × 10 –8 Ω m, Relative density of Al = 2.7, of Cu = 8.9.)

Length of aluminium = l 1

Resistance of aluminium = R

Resistivity of aluminium, ρ AI =ρ 1 = 2.63×10 −8 Ωm

Relative density of aluminium, d 1 =2.7

Area of the cross-section of the aluminium wire =A 1

Length of copper = l 2

Resistance of copper = R 2

Resistivity of copper, ρ cu =ρ 2 =1.72 × 10 –8 Ω m

Relative density of copper, d 2 = 8.9

Area of the cross-section of the copper wire =A 2

Therefore, $\begin{array}{l}R_{1}=\rho _{1}\frac{l_{1}}{A_{1}}\end{array} $ ——(1)

It is given that R 1 = R 2 Therefore,

Given l 1 = l 2

$\begin{array}{l}\frac{\rho _{1}}{A_{1}}= \frac{\rho _{2}}{A_{2}}\end{array} $ $\begin{array}{l}\frac{A_{1}}{A_{2}}= \frac{\rho _{1}}{\rho _{2}}\end{array} $

= (2.63×10 −8 )/(1.72 × 10 –8 ) = 1.52

Mass of aluminium, m 1 = Volume x density

= A 1 l 1 x d 1

Mass of copper = m 2 = Volume x density

= A 2 l 2 x d 2

m 1 /m 2 =(A 1 l 1 x d 1 / A 2 l 2 x d 2 ) Since l 1 = l 2

m 1 /m 2 =(A 1 d 1 / A 2 d 2 )

m 1 /m 2 = (1.52) x (2.7/8.9)

= (1.52) x (0.303)

m 1 /m 2 = 0.46

The mass ratio of aluminium to copper is 0.46. Since aluminium is lighter, it is preferred for long suspensions of cables

Question 3.17:

What conclusion can you draw from the following observations on a resistor made of alloy manganin?

Ohm’s law is valid with high accuracy. This means that the resistivity of the alloy manganin is nearly independent of temperature.

Question 3.18:

Answer the following questions: (a) A steady current flows in a metallic conductor of the non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed? (b) Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements that do not obey Ohm’s law. (c) A low voltage supply from which one needs high currents must have very low internal resistance. Why? (d) A high tension (HT) supply of, say, 6 kV must have a very large internal resistance. Why?

(a) Current is given to be steady. Therefore, it is a constant. The current density, electric field, drift speed depends on the area of the cross-section inversely. (b) No, examples of non-ohmic elements are vacuum diodes, semiconductor diodes, etc. (c) Because the maximum current drawn from a source = ε/r. (d) If the circuit is shorted (accidentally), the current drawn will exceed safety limits if the internal resistance is not large.

Question 3. 19:

Choose the correct alternative: (a) Alloys of metals usually have (greater/less) resistivity than that of their constituent metals. (b) Alloys usually have much (lower/higher) temperature coefficients of resistance than pure metals. (c) The resistivity of the alloy manganin is nearly independent of/ increases rapidly with increase of temperature. (d) The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of (10 22 /10 23 ).

(a) greater

Question 3.20:

(a) Given n resistors each of resistance R, how will you combine them to get the (i) maximum (ii) minimum effective resistance? What is the ratio of the maximum to minimum resistance? (b) Given the resistances of 1 Ω, 2 Ω, 3 Ω, how will be combine them to get an equivalent resistance of (i) (11/3) Ω (ii) (11/5) Ω, (iii) 6 Ω, (iv) (6/11) Ω? (c) Determine the equivalent resistance of networks shown in figure

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 20 Solution - image 1

(a) Total number of resistors = n

Resistance of each resistor = R

(i) The maximum effective resistance is got when the resistors are connected in series. The effective resistance R 1 = nR

(ii) The minimum effective resistance is got when the resistors are connected in parallel, the effective resistance R 2 = R/n

The ratio of maximum resistance to minimum resistance = nR/(R/n) = n 2

(b) The resistance given are 1 Ω, 2 Ω, 3 Ω

Consider the following combination

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 20 Solution - image 2

The resistors of resistance 1 Ω and 2 Ω are parallel. Therefore, effective resistance $\begin{array}{l}\frac{1}{R’} = \left [\frac{1}{1}+\frac{1}{2} \right ]= 3/2\end{array} $

These resistors are connected in series with 3 Ω. Therefore the effective resistance R = R’ + 3 = (2/3) +3 = 11/3 Ω

(ii) 11/5 Ω

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 20 Solution - image 3

The resistors of resistance 2 Ω and 3 Ω are parallel. Therefore, effective resistance $\begin{array}{l}\frac{1}{R’} = \left [\frac{1}{2}+\frac{1}{3} \right ]= 5/6\end{array} $

These resistors are connected in series with 3 Ω. Therefore the effective resistance R = R’ + 3 = (6/5) +1 = 11/5 Ω

When the resistors with resistance 1 Ω, 2 Ω, 3 Ω are connected in series the effective resistance is given by

1 Ω +2 Ω + 3 Ω = 6 Ω

(iv) (6/11) Ω

When the resistors are connected in parallel the effective resistance is $\begin{array}{l}\frac{1}{R’} = \left [\frac{1}{1}+\frac{1}{2} +\frac{1}{3}\right ]= 11/6 \Omega\end{array} $

R’ = (6/11) Ω

(c) (a) In all the loops, two resistors of resistance 1Ω are connected in series. Therefore, the effective resistance is (1+1) = 2 Ω

Similarly, In all the loops, two resistors of resistance 2Ω are connected in series. Therefore, the effective resistance is (2+2) = 4 Ω

The 2Ω and 4Ω resistors are connected in parallel in all four loops. Therefore, the effective resistance = $\begin{array}{l}\frac{1}{R’} = \left [\frac{1}{2} +\frac{1}{4}\right ]= 3/4 \Omega\end{array} $

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 20 Solution - image 4

All four resistors are connected in series. Hence the equivalent resistance R each is (4/3) x 4 = 16/3 Ω

Question 3.21:

Determine the current drawn from a 12V supply with internal resistance 0.5Ω by the infinite network shown in the figure. Each resistor has 1Ω resistance.

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 21 Solution - image 1

Let the effective resistance of the infinite network be X. Since it is an infinite network, adding three resistors of 1 Ω resistance will not change the total resistance, i.e., it will remain X. The circuit will look like this if three resistors are added.

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 21 Solution - image 2

The equivalent resistance of this network is R’ = R + (equivalent resistance when X and R are parallel) + R

= R + [XR/(X+R)] + R

R’ = 2R + [XR/(X+R)]

As said above, since it is an infinite network, adding three resistors of 1 Ω resistance will not change the total resistance.

⇒ 2R + [XR/(X+R)] = X

Since R = 1Ω we get

2 x 1 + [X x 1/(X+1)] = X

X 2 – 2X -2 = 0

The value of resistance cannot be negative. Therefore, X= 1+√3 = 2.732 Ω

Given E = 12 V ; r = 0.5 Ω

If I is the current drawn by the network, then

I = E/(X+r) = 12/(2.732+ 0.5) = 3.713 A

Question 3. 22:

Figure shows a potentiometer with a cell of 2.0 V and internal resistance 0.40 Ω maintaining a potential drop across the resistor wire AB. A standard cell which maintains a constant emf of 1.02 V (for very moderate currents upto a few mA) gives a balance point at 67.3 cm length of the wire. To ensure very low currents drawn from the standard cell, a very high resistance of 600 kΩ is put in series with it, which is shorted close to the balance point. The standard cell is then replaced by a cell of unknown emf ε and the balance point found similarly, turns out to be at 82.3 cm length of the wire.

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 22 Solution

(a) What is the value ε?

(b) What purpose does the high resistance of 600 kΩ have?

(d) Would the method work in the above situation if the driver cell of the potentiometer had an emf of 1.0V instead of 2.0V?

(e) Would the circuit work well for determining an extremely small emf, say of the order of a few mV (such as the typical emf of a thermo-couple)? If not, how will you modify the circuit?

(a) Constant emf of the standard cell, E 1 = 1.02 V

The balance point on the wire, l 1 = 67.3 cm

The standard cell is then replaced by a cell of unknown emf ε and the balance point changes to l = 82.3 cm

The relation between Emf and the balancing point

(E 1 /l 1 ) = (ε/l)

ε = (l x E 1 /l 1 ) = (82.3 x 1.02)/67.3 = 1.247 V

(b) The purpose of using high resistance of 600 kΩ is to reduce current through the galvanometer when the movable contact is far from the balance point.

(d) No. If ε is greater than the emf of the driver cell of the potentiometer, there will be no balance point on the wire AB.

(e) The circuit will not be suitable, because the balance point (for ε of the order of a few mV) will be very close to the end A and the percentage of error in the measurement will be very large. The circuit can be modified by putting a suitable resistor R in series with the wire AB so that the potential drop across AB is only slightly greater than the emf to be measured. Then, the balance point will be at a larger length of the wire and the percentage error will be much smaller.

Question 3. 23:

Figure below shows a 2.0 V potentiometer used for the determination of internal resistance of a 1.5 V cell. The balance point of the cell in open circuit is 76.3 cm. When a resistor of 9.5 Ω is used in the external circuit of the cell, the balance point shifts to 64.8 cm length of the potentiometer wire. Determine the internal resistance of the cell.

NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity Question 23 Solution

Internal resistance of the cell, r = 1.5 V cell

Balance point of the cell in open circuit, l = 76.3 cm

External resistance, R = 9.5 Ω

New balance point, l 1 = 64. 8 cm

The expression for internal resistance is given as

Class 12 Physics NCERT Solutions for Current Electricity

Chapter 3 Current Electricity of Class 12 Physics is framed as per the current CBSE Syllabus 2023-24. The important questions in Chapter 3 of Physics NCERT Solutions for Class 12 that are frequently asked are definitions of resistance, conductance, drift velocity, cell EMF, resistivity, conductance and internal resistance. The graphing of resistivity for metals, semiconductors and alloys must be practised thoroughly. Students must be well-versed in the conversion of complex circuits into simple series and parallel circuits. Students should practise a wide range of problems to get better at this. Questions from potentiometer or meter bridge are regularly asked. The resistivity chart for different colour codes can be asked in the board exam.

Topics covered in NCERT Class 12 Chapter 3 of Physics Current Electricity

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Dropped Topics –

3.7 Resistivity of Various Materials (delete Tables 3.1 and 3.2 and Carbon resistors, Colour code for carbon resistor) 3.10 Combinations of Resistors – Series and Parallel Example 3.5 3.15 Meter Bridge 3.16 Potentiometer Exercises 3.3, 3.4, 3.10, 3.12, 3.14–3.23

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