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Case Study Questions Class 10 Science

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Download Case study questions for CBSE class 10 Science in PDF format from the myCBSEguide App . We have the new pattern case study-based questions for free download. Class 10 Science case study questions

This article will guide you through:

What are case study questions?

• Sample Papers with Case Study questions
• Class 10 Science Case Study question examples
• How to get case-based questions for free?
• How to attempt the case-based questions in Science?

Questions based on case studies are some real-life examples. The questions are asked based on a given paragraph i.e. Case Study.  Usually, 4-5 questions are asked on the basis of the given passage. In most cases, these are either MCQs or assertion & reason type questions. Let’s take an example to understand. There is one paragraph on how nitrogen is generated in the atmosphere. On the basis of this paragraph, the board asks a few objective-type questions. In other words, it is very similar to the unseen passages given in language papers. But the real cases may be different. So, read this article till the end to understand it thoroughly.

What is CBE?

CBSE stands for competency-based education. The case study questions are part of this CBE. The purpose of CBE is to demonstrate the learning outcomes and attain proficiency in particular competencies.

Questions on Real-life Situations

As discussed the case study questions are based on real-life situations. Especially for grade 10 science, it is very essential to have the practical knowledge to solve such questions. Here on the myCBSEguide app, we have given many such case study paragraphs that are directly related to real-life implications of the knowledge.

Sample Papers with Case Study Questions

Class 10 Science Sample Papers with case study questions are available in the myCBSEguide App . There are 4 such questions (Q.No.17 to 20) in the CBSE model question paper. If you analyze the format, you will find that the MCQs are very easy to answer. So, we suggest you, read the given paragraph carefully and then start answering the questions. In some cases, you will find that the question is not asked directly from the passage but is based on the concept that is discussed there. That’s why it is very much important to understand the background of the case study paragraph.

CBSE Case Study Sample Papers

You can download CBSE case study sample papers from the myCBSEguide App or Student Dashboard. Here is the direct link to access it.

Case Study Question Bank

As we mentioned that case study questions are coming in your exams for the last few years. You can get them in all previous year question papers issued by CBSE for class 1o Science. Here is the direct link to get them too.

Class 10 Science Case Study Question Examples

As you have already gone through the four questions provided in the CBSE model question paper , we are proving you with other examples of the case-based questions in the CBSE class 10 Science. If you wish to get similar questions, you can download the myCBSEguide App and access the Sample question papers with case study-type questions.

Case-based Question -1

Read the following and answer any four questions: Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salt bed of rack salt was formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, and bleaching powder.

• Phosphoric acid
• Carbonic acid
• Hydrochloric acid
• Sulphuric acid
• Blue vitriol
• Washing soda
• Baking soda
• Bleaching powder

Case-based Question -2

• V 1  + V 2  + V 3
• V 1  – V 2  +V 2
• None of these
• same at every point of the circuit
• different at every point of the circuit
• can not be determined
• 20 3 Ω 203Ω
• 15 2 Ω 152Ω

Case-based Question -3

• pure strips
• impure copper
• refined copper
• none of these
• insoluble impurities
• soluble impurities
• impure metal
• bottom of cathode
• bottom of anode

How to Attempt the Case-Based Questions in Science?

Before answering this question, let’s read the text given in question number 17 of the CBSE Model Question Paper.

All living cells require energy for various activities. This energy is available by the breakdown of simple carbohydrates either using oxygen or without using oxygen.

See, there are only two sentences and CBSE is asking you 5 questions based on these two sentences. Now let’s check the first questions given there.

Energy in the case of higher plants and animals is obtained by a) Breathing b) Tissue respiration c) Organ respiration d) Digestion of food

Now let us know if you can relate the question to the paragraph directly. The two sentences are about energy and how it is obtained. But neither the question nor the options have any similar text in the paragraph.

So the conclusion is, in most cases, you will not get direct answers from the passage. You will get only an idea about the concept. If you know it, you can answer it but reading the paragraph even 100 times is not going to help you.

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Important Case Study Questions for CBSE Class 10 Science Exam 2024 with Answers

Download case study questions for class 10 science to prepare for the cbse board exam 2024. these multiple choice type questions with answers are published by the cbse board to provide sample questions to students..

CBSE Class 10 Science Case Study Questions 2024: Get here the questions based on case studies to practise for the CBSE Class 10 Science exam 2024. The CBSE Class 10 Science Question Bank on Case Studies, provided in this article, can be very helpful for understanding how the source based or case based questions are asked in the board exam. This question bank is published by the CBSE Board itself which makes it a very reliable source for the board exam preparations. Each question has five sub-questions with each followed by four options and a correct answer. Students can easily download these sample questions in PDF format and refer to the same for their exam preparations.

Note: Check the reduced CBSE Syllabus for Class 10 Science for 2024 Exam and then practise the case study questions accordingly for the CBSE Class 10 Board Exam 2024.  

Important*  Important Last Minute Tips and Resources for CBSE Class 10 Science Exam 2024

SCIENCE- Class X

Sample Case Studies

1. Read the following and answer any four questions from 1.1 to 1.5:

Marble’s popularity began in ancient Rome and Greece, where white and off-white marble were used to construct a variety of structures, from hand-held sculptures to massive pillars and buildings.

1.1 The substance not likely to contain CaCO 3 is

a) Dolomite

b) A marble statue

c) Calcined gypsum

d) Sea shells.

Answer: c) Calcined gypsum

1.2 A student added 10g of calcium carbonate in a rigid container, secured it tightly and started to heat it. After some time, an increase in pressure was observed, the pressure reading was then noted at intervals of 5 mins and plotted against time, in a graph as shown below. During which time interval did maximum decomposition took place?

a) 15-20 min

b) 10-15 min

c) 5-10 min

Answer: d) 0-5 min

1.3 Gas A, obtained above is a reactant for a very important biochemical process which occurs in the presence of sunlight. Identify the name of the process -

a) Respiration

b) Photosynthesis

c) Transpiration

d) sphotolysis

Answer: b) Photosynthesis

1.4 Marble statues are corroded or stained when they repeatedly come into contact with polluted rain water. Identify the main reason.

a) decomposition of calcium carbonate to calcium oxide

b) polluted water is basic in nature hence it reacts with calcium carbonate

c) polluted water is acidic in nature hence it reacts with calcium carbonate

d) calcium carbonate dissolves in water to give calcium hydroxide.

Answer: c) polluted water is acidic in nature hence it reacts with calcium carbonate

1.5 Calcium oxide can be reduced to calcium, by heating with sodium metal. Which compound would act as an oxidizing agent in the above process?

b) sodium oxide

d) calcium oxide

Answer: d) calcium oxide

2. Read the following and answer any four questions from 2.1 to 2.5:

The reaction between MnO2 with HCl is depicted in the following diagram. It was observed that a gas with bleaching abilities was released.

2.1 The chemical reaction between MnO 2 and HCl is an example of:

a) displacement reaction

b) combination reaction

c) redox reaction

d) decomposition reaction

Answer: c) redox reaction

2.2 Chlorine gas reacts with _______ to form bleaching powder.

a) dry Ca(OH) 2

b) dil. solution of Ca(OH) 2

c) conc. solution of Ca(OH) 2

Answer: a) dry Ca(OH) 2

2.3 Identify the correct statement from the following:

a) MnO 2 is getting reduced whereas HCl is getting oxidized

b) MnO 2 is getting oxidized whereas HCl is getting reduced.

c) MnO 2 and HCl both are getting reduced.

d) MnO 2 and HCl both are getting oxidized.

Answer: a) MnO 2 is getting reduced whereas HCl is getting oxidized

2.4 In the above discussed reaction, what is the nature of MnO 2 ?

a) Acidic oxide

b) Basic oxide

c) Neutral oxide

d) Amphoteric oxide

Answer: b) Basic oxide

2.5 What will happen if we take dry HCl gas instead of aqueous solution of HCl?

a) Reaction will occur faster.

b) Reaction will not occur.

c) Reaction rate will be slow.

d) Reaction rate will remain the same.

Answer: b) Reaction will not occur.

Also, check below other important study material released by the CBSE Board:

CBSE Class Maths Case Study Questions for All Chapters (Published by CBSE)

MCQs for Class 10 English Footprints without Feet (Published by CBSE)

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CBSE 10th Standard Science Subject Light Reflection and Refraction Chapter Case Study Questions With Solution 2021

By QB365 on 21 May, 2021

QB365 Provides the updated CASE Study Questions for Class 10 , and also provide the detail solution for each and every case study questions . Case study questions are latest updated question pattern from NCERT, QB365 will helps to get  more marks in Exams 

QB365 - Question Bank Software

Cbse 10th standard science subject light reflection and refraction case study questions with solution 2021.

10th Standard CBSE

Final Semester - June 2015

The curved surface of a spoon can be considered as a spherical mirror. A highly smooth polished surface is called mirror. The mirror whose reflecting surface is curved inwards or outwards is called a spherical mirror. Inner part works as a concave mirror and the outer bulging part acts as a convex mirror. The center of the reflecting surface of a mirror is called pole and the radius of the sphere of which the mirror is formed is called radius of curvature. (i) When a concave mirror is held towards the sun and its sharp image is formed on a piece of carbon paper for some time, a hole is burnt in the carbon paper. What is the name given to the distance between the mirror and carbon paper?

(ii) The distance between pole and focal point of a spherical mirror is equal to the distance between

(iii) The focal length of a mirror is 15 cm. The radius of curvature is

(iv) The normal at any point on the mirror passes through

(v) In a convex spherical mirror, reflection of light takes place at

The spherical mirror forms different types of images when the object is placed at different locations. When the image is formed on screen, the image is real and when the image does not form on screen, the image is virtual. When the two reflected rays meet actually, the image is real and when they appear to meet, the image is virtual. A concave mirror always forms a real and inverted image for different positions of the object. But if the object is placed between the focus and pole, the image formed is virtual and erect. A convex mirror always forms a virtual, erect and diminished image. A concave mirror is used as doctor's head mirror to focus light on body parts like eyes, ears, nose etc., to be examined because it can form erect and magnified image of the object. The convex mirror is used as a rear view mirrors in automobiles because it can form an small and erect image of an object. (i) When an object is placed at the centre of curvature of a concave mirror, the image formed is

(ii) No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be

(iii) A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.

(iv) To get an image larger than the object, one can use (a) convex mirror but not a concave mirror (b) a concave mirror but not a convex mirror (c) either a convex mirror or a concave mirror (d) a plane mirror. (v) A convex mirror has wider field of view because (a) the image formed is much smaller than the object and large number of images can be seen (b) the image formed is much closer to the mirror (c) both (a) and (b) (d) none of these.

The relation between distance of an object from the mirror (u), distance of image from the mirror (v) and the focal length (F) is called mirror formula. This formula is valid in all situations for all spherical mirrors for all positions of the object. The size of image formed by a spherical mirror depends on the position of the object from the mirror. The image formed by a spherical mirror can be bigger than the object, equal to the object or smaller than the object. The size of the image relative to the object is given by the linear magnification (m). Thus, the magnification is given by the ratio of height of image to the height of object. If magnification is negative, image is real and if it is positive, image is virtual. (i) What is the position of an image when an object is placed at a distance of 20 em from a concave mirror of focal length 20 cm?

(iii) If the magnification of an image is -2, the characteristic of image will be

(iv) The mirror formula holds for

(v) A parallel beam of light is made to fall on a concave mirror. An image is formed at a distance of7.5 from the mirror. The focal length of the mirror is

(ii) A ray of light passes from a medium A to another medium B. No bending of light occurs if the ray of light hits the boundary of medium B at an angle of

(iii) When light passes from one medium to another, the frequency of light

(iv) When light passes from glass to water, the speed of light

(v) The bottom of pool filled with water appears to be ______ due to refraction of light

*****************************************

Cbse 10th standard science subject light reflection and refraction case study questions with solution 2021 answer keys.

(i) (d) : When an object is placed at the focus of a concave mirror, the..image is formed at infinity. (ii) (d) : When a light ray parallel to the principal axis is incident on a concave mirror, it passes through the principal focus after reflection. Therefore, figure D is correct. (iii) (a) : If m is negative, the image will be real and inverted. (iv) (d) (v) (b): The distance of object from mirror =  \(\infty\) Using,  \(\frac{1}{v}+\frac{1}{u}=\frac{1}{f}\) \(\frac{1}{\infty}-\left(-\frac{1}{7.5}\right)=\frac{1}{f}\) f = 7.5 cm

(i) (a): When, a ray of light travels from air to glass, it bends towards the normal. (ii) (c): No bending of light occurs when light is incident normally or perpendicularly on a boundary of two media since angle of incidence and angle of refraction both are zero. (iii) (c): When light goes from one medium to other medium, its frequency does not change (iv) (a): The speed to light increases when light passes from glass to water as water is optically rarer medium. (v) (a): The bottom of a pool of water appears to be less deep than it actually is due to refraction.

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Case Study Class 10 Science Questions and Answers (Download PDF)

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Case Study Class 10 Science

If you are looking for the CBSE Case Study class 10 Science in PDF, then you are in the right place. CBSE 10th Class Case Study for the Science Subject is available here on this website. These Case studies can help the students to solve the different types of questions that are based on the case study or passage.

CBSE Board will be asking case study questions based on Science subjects in the upcoming board exams. Thus, it becomes an essential resource to study. 

The Case Study Class 10 Science Questions cover a wide range of chapters from the subject. Students willing to score good marks in their board exams can use it to practice questions during the exam preparation. The questions are highly interactive and it allows students to use their thoughts and skills to solve the given Case study questions.

Download Class 10 Science Case Study Questions and Answers PDF (Passage Based)

Download links of class 10 Science Case Study questions and answers pdf is given on this website. Students can download them for free of cost because it is going to help them to practice a variety of questions from the exam perspective.

Case Study questions class 10 Science include all chapters wise questions. A few passages are given in the case study PDF of Science. Students can download them to read and solve the relevant questions that are given in the passage.

Students are advised to access Case Study questions class 10 Science CBSE chapter wise PDF and learn how to easily solve questions. For gaining the basic knowledge students can refer to the NCERT Class 10th Textbooks. After gaining the basic information students can easily solve the Case Study class 10 Science questions.

Case Study Questions Class 10 Science Chapter 1 Chemical Reactions & Equations

Case Study Questions Class 10 Science Chapter 2 Acids, Bases & Salts

Case Study Questions Class 10 Science Chapter 3 Metals & Non-metals

Case Study Questions Class 10 Science Chapter 4 Carbon & Its Compounds

Case Study Questions Class 10 Science Chapter 5 Periodic Classification of Elements

Case Study Questions Class 10 Science Chapter 6 Life Processes

Case Study Questions Class 10 Science Chapter 8 How Do Organisms Reproduce

Case Study Questions Class 10 Science Chapter 9 Heredity & Evolution

Case Study Questions Class 10 Science Chapter 10 Light-Reflection & Refraction

Case Study Questions Class 10 Science Chapter 11 The Human Eye & the Colourful World

Case Study Questions Class 10 Science Chapter 12 Electricity

Case Study Questions Class 10 Science Chapter 13 Magnetic Effects of Electric Current

Case Study Questions Class 10 Science Chapter 15 Our Environment

How to Solve Case Study Based Questions Class 10 Science?

In order to solve the Case Study Based Questions Class 10 Science students are needed to observe or analyse the given information or data. Students willing to solve Case Study Based Questions are required to read the passage carefully and then solve them. 

While solving the class 10 Science Case Study questions, the ideal way is to highlight the key information or given data. Because, later it will ease them to write the final answers. 

Case Study class 10 Science consists of 4 to 5 questions that should be answered in MCQ manner. While answering the MCQs of Case Study, students are required to read the paragraph as they can get some clue in between related to the topics discussed.

Also, before solving the Case study type questions it is ideal to use the CBSE Syllabus to brush up the previous learnings.

Features Of Class 10 Science Case Study Questions And Answers Pdf

Students referring to the Class 10 Science Case Study Questions And Answers Pdf from Selfstudys will find these features:-

• Accurate answers of all the Case-based questions given in the PDF.
• Case Study class 10 Science solutions are prepared by subject experts referring to the CBSE Syllabus of class 10.
• Free to download in Portable Document Format (PDF) so that students can study without having access to the internet.

Benefits of Using CBSE Class 10 Science Case Study Questions and Answers

Since, CBSE Class 10 Science Case Study Questions and Answers are prepared by our Science experts referring to the CBSE Class 10 Science Syllabus , it provided benefits in various way:-

• Case study class 10 Science helps in exam preparation since, CBSE Class 10 Question Papers contain case-based questions.
• It allows students to utilise their learning to solve real life problems.
• Solving case study questions class 10 Science helps students in developing their observation skills.
• Those students who solve Case Study Class 10 Science on a regular basis become extremely good at answering normal formula based Science questions.
• By using class 10 Science Case Study questions and answers pdf, students focus more on Selfstudys instead of wasting their valuable time.
• With the help of given solutions students learn to solve all Case Study questions class 10 Science CBSE chapter wise pdf regardless of its difficulty level.

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Case Study Chapter 13 Magnetic Effect of Electric Current

Please refer to Chapter 13 Magnetic Effect Of Electric Current Case Study Questions with answers provided below. We have provided Case Study Questions for Class 10 Science for all chapters as per CBSE, NCERT and KVS examination guidelines. These case based questions are expected to come in your exams this year. Please practise these case study based Class 10 Science Questions and answers to get more marks in examinations.

Case Study Questions Chapter 13 Magnetic Effect Of Electric Current

Case/Passage – 1 A solenoid is a long helical coil of wire through which a current is run in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the solenoid and close to zero outside and is similar to the field of a bar magnet  having a north pole at one end and a south pole at the other depending upon the direction of current flow. The magnetic field produced in the solenoid is dependent on a few factors such as, the current in the coil, number of turns per unit length etc. The following graph is obtained by a researcher while doing an experiment to see the variation of the magnetic fieldwith respect to the current in the solenoid. The unit of magnetic field as given in the graph attached is in milli-Tesla (mT) and the current is given in Ampere. 

Question: What will happen if a soft iron bar is placed inside the solenoid? (a) The bar will be electrocuted resulting in shortcircuit. (b) The bar will be magnetised as long as there is current in the circuit. (c) The bar will be magnetised permanently. (d) The bar will not be affected by any means.   

Question: From the graph deduce which of the following statements is correct. (a) For a current of 0.8A the magnetic field is 13 mT (b) For larger currents, the magnetic field increases nonlinearly. (c) For a current of 0.8A the magnetic field is 1.3 mT (d) There is not enough information to find the magnetic field corresponding to 0.8A current.   

Question: The magnetic field lines produced inside the solenoid are similar to that of … (a) a bar magnet 10 (b) a straight current carrying conductor (c) a circular current carrying loop (d) electromagnet of any shape   

Question: What type of energy conversion is observed in a linear solenoid? (a) Mechanical to Magnetic (b) Electrical to Magnetic (c) Electrical to Mechanical (d) Magnetic to Mechanical 

Question: After analysing the graph a student writes the following statements. I. The magnetic field produced by the solenoid is inversely proportional to the current. II. The magnetic field produced by the solenoid is directly proportional to the current. III. The magnetic field produced by the solenoid is directly proportional to square of the current. IV. The magnetic field produced by the solenoid is independent of the current. Choose from the following which of the following would be the correct statement(s). (a) Only IV (b) I and III and IV (c) I and II (d) Only II       

Case/Passage – 2 For a conductor of length L carrying a current of I in a field B the force experienced by the conductor F → = I L →  x →  B If the current-carrying conductor in the form of a loop of any arbitrary shape is placed in a uniform field, then, F →  =0 i.e., the net magnetic force on a current loop in a uniform magnetic field is always zero. Here it must be kept in mind that in this situation different parts of the loop may experience elemental force due to which the loop may be under tension or may experience a torque. Direction of force can be determined by fleming’s left hand rule, right hand palm rule or screw rule.

Question: An electron moving with uniform velocity in x-direction enters a region of uniform magnetic field along y-direction. Which of the following physical quantity(ies) is (are) non-zero and remain constant?

I. Velocity of the electron II. Magnitude of the momentum of the electron. III. Force on the electron. IV. The kinetic energy of electron. (a) Only I andII. (b) Only III and IV. (c) All four (d) Only II and IV. 

Question: A wire is lying horizontally in the north-south direction and there is a horizontal magnetic field pointing towards and the east. Some positive charges in the wire move north and an equal number of negative charges move south. The direction of force on the wire will be

(a) east (b) down, into the page (c) up, out of the page (d) west   

Question: Which of the following can produce a magnetic field? (a) Electric charges at rest (b) Electric charges in motion (c) Only by permanent magnets    (d) Electric charges whether at rest or in motion       

Question: The direction of induced current is obtained by (a) Fleming’s left hand rule (b) Maxwell’s cork-screw rule (c) Ampere’s rule (d) Fleming’s right hand rule 

Question: Four situations are given below- I. An infinitely long wire carrying current II. A rectangular loop carrying current III. A solenoid of finite length carrying current IV. A circular loop carrying current. In which of the above cases will the magnetic field produced be like that of a bar magnet? (a) I (b) I and III (c) Only III (d) Only IV     

Case/Passage – 3

The strength of the magnetic field produced by a currentcarrying circular coil (or circular wire) depends on (i) Current flowing through the coil. (ii) Radius of the circular coil. (iii) Number of turns of wire in the circular coil.

Question: What type of curve we get, between magnetic field and distance along the axis of a current carrying circular coil? (a) Straight (b) Circular (c) Parabolic (d) None of these   

Question:A long horizontal power line is carrying a current of 100 A in the east-west direction. The direction of magnetic field at a point 1.0 m below it is (a) south to north (b) north to south (c) east to west (d) west to east   

Question: If a current carrying straight conductor is placed is east-west direction, then the direction of the force experienced by the conductor due to earth’s magnetic field is: (a) downward (b) upward (c) east-west (d) west east   

Case/Passage – 4

Study this table related to wattage of home appliances and answer the questions that follow.

Question. Which of the following will to consume least power? (a) Laptop (b) Desktop (c) Printer (d) Blender

Question. Many appliance works on the principle of electromagnetic induction. The role which depicts the direction of induced current is as (a) Faraday’s rule (b) Henery’s rule (c) Fleming’s rule (d) Maxwell’s rule

Question. Which of the following home applicance is not based on magnetic effect of current? (a) Ceiling fan (b) Blender (c) Geyser (d) Washing Machine

Question. Which of the following will consume maximum power? (a) Fridge (b) Iron (c) Air conditioner (d) Coffee maker

Question. Which of the following lighting device is best to use in terms of power consumption? (a) Bulb (b) CFL (c) Tube light (d) LED

Case/Passage – 5

A magnetic stripe card, also referred to as a swipe card or magstripe, is a plastic card with a magnetic strip attached on its surface. This stripe is made of tiny iron-based components whose magnetism can be modified and can therefore be used to store information. A magstripe is quite similar to a magnetic recording tape, which you might find in videotape or a music cassette. The magnetic strip on a card can be ‘written’ or encoded with information because the tiny iron-based particles that make up the strip can be magnetised in different directions by a device that produces a strong magnetic field. This device is a ‘solenoid’, which is basically a coil wound into a tightly packed helix. The wire is wound around a highpermeable, metallic core that produces a strong magnetic field when a current is passed through it. This device encodes the required information onto the stripe, which is then pasted on a plastic card. When a card with a magnetic strip is moved back and forth over the ‘reader head’ , a voltage is induced in the coils of the card reader device. A card reader consists of solenoid too – the same component that is used to write information in the magnetic strip. This voltage can be amplified and recorded electronically, which is finally read by a computer (or a processor installed within the reader) to authenticate a user (in the case of identity cards) or a transaction (in the case of credit/debit cards).

Question. The force on a wire inside a magnetic field increase when (a) The current is increased (b) Strength of magnetic field increases (c) Length of wire is increased (d) All of above

Question. The factors on which one magnetic field strength produced by current carrying solenoids depends are (a) Magnitude of current (b) Number of turns (c) Heat produced (d) Both (a) and (b)

Question. Which of the following are the devices that uses magnetic theory to record data (a) The hotel key cards (b) Audio tapes (c) CD’s (d) All of the above

Question. The information of users which are read by the ATM machines are stored on (a) Magnetic box on card (b) Magnetic strip on card (c) Inside ATM machine (d) None of above

Question. Name the scientist who gave the principle of electromagnetic field (a) Oersted (b) Faraday (c) Bohr (d) Ampere

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Class 10 Science: Case Study Chapter 10 Light Reflection and Refraction PDF Download

In CBSE Class 10 Science Paper, Students will have to answer some questions based on  Assertion and Reason . There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given.

Here we are providing you with Class 10 Science Chapter 10 Light Reflection and Refraction Case Study Questions, by practicing these Case Study and Passage Based Questions will help you in your Class 10th Board Exam.

Case Study Chapter 10 Light Reflection and Refraction

Here, we have provided case-based/passage-based questions for Class 10 Science  Chapter 10 Light Reflection and Refraction

Case Study/Passage-Based Questions

Question 1:

The spherical mirror forms different types of images when the object is placed at different locations. When the image is formed on the screen, the image is real and when the image does not form on-screen, the image is virtual. When the two reflected rays meet actually, the image is real and when they appear to meet, the image is virtual. A concave mirror always forms a real and inverted image for different positions of the object. But if the object is placed between the focus and pole, the image formed is virtual and erect. A convex mirror always forms a virtual, erect, and diminished image. A concave mirror is used as a doctor’s head mirror to focus light on body parts like eyes, ears, nose, etc., to be examined because it can form erect and magnified images of the object. The convex mirror is used as a rear view mirror in automobiles because it can form a small and erect image of an object.

(i) When an object is placed at the center of curvature of a concave mirror, the image formed is

Answer: (c) same size as that of the object

(ii) No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be

Answer: (d): The image is erect in a plane mirror and also in a convex mirror, for all positions of the object.

(iii) A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.

Answer: (c) : As the image of head is bigger, the upper portion of magic mirror is concave. The middle portion of the image is of same size, so, middle portion of magic mirror is plane. Now, the image of legs looks smaller, therefore, the lower portion of magic mirror is convex.

(iv) To get an image larger than the object, one can use (a) convex mirror but not a concave mirror (b) a concave mirror but not a convex mirror (c) either a convex mirror or a concave mirror (d) a plane mirror.

Answer: (b) a concave mirror but not a convex mirror

(v) A convex mirror has wider field of view because (a) the image formed is much smaller than the object and large number of images can be seen (b) the image formed is much closer to the mirror (c) both (a) and (b) (d) none of these.

Answer: (c) both (a) and (b)

Question 2:

The lenses form different types of images when objects are placed at different locations. When a ray is incident parallel to the principal axis, then after refraction, it passes through the focus or appears to come from the focus.

When a ray goes through the optical center of the lens, it passes without any deviation. If the object is placed between the focus and the optical center of the convex lens, an erect and magnified image is formed.

As the object is brought closer to the convex lens from infinity to focus, the image moves away from the convex lens from focus to infinity. Also, the size of the image goes on increasing and the image is always real and inverted.

A concave lens always gives a virtual, erect, and diminished image irrespective of the position of the object.

(i) The location of image formed by a convex lens when the object is placed at infinity is (a) at focus (b) at 2F (c) at optical center (d) between Fand 2F

Answer: (a) at focus

(ii) When the object is placed at the focus of concave lens, the image formed is (a) real and smaller (b) virtual and inverted (c) virtual and smaller (d) real and erect

Answer: (b) virtual and inverted

(iii) The size of image formed by a convex lens when the object is placed at the focus of convex lens is (a) small (b) point in size (c) highly magnified (d) same as that of object

Answer: (c) highly magnified

(iv) When the object is placed at 2F in front of convex lens, the location of image is (a) at F (b) at 2 F on the other side (c) at infinity (d) between F and optical center

Answer: (b) at 2 F on the other side

(v) At which location of object in front of concave lens, the image between focus and optical centre is formed (a) anywhere between centre and infinity (b) at F (c) at 2F (d) infinity

Answer: (a) anywhere between centre and infinity

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Case Study Questions Class 10 Science Chapter 12 Electricity

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Case study Questions Class 10 Science Chapter 12  are very important to solve for your exam. Class 10 Science Chapter 12 Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 10 Science Chapter 12 Electricity

Join our Telegram Channel, there you will get various e-books for CBSE 2024 Boards exams for Class 9th, 10th, 11th, and 12th.

In CBSE Class 10 Science Paper, Students will have to answer some questions based on  Assertion and Reason . There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Electricity Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 10 Science  Chapter 12 Electricity

Case Study/Passage Based Questions

Question 1:

The heating effect of current is obtained by the transformation of electrical energy into heat energy. Just as mechanical energy used to overcome friction is covered into heat, in the same way, electrical energy is converted into heat energy when an electric current flows through a resistance wire. The heat produced in a conductor, when a current flows through it is found to depend directly on (a) strength of current (b) resistance of the conductor (c) time for which the current flows. The mathematical expression is given by H = I 2 Rt. The electrical fuse, electrical heater, electric iron, electric geyser, etc. all are based on the heating effect of current.

(i) What are the properties of heating elements? (a) High resistance, high melting point (b) Low resistance, high melting point (c) Low resistance, high melting point (d) Low resistance, low melting point.

Answer: (b) Low resistance, high melting point

(ii) What are the properties of an electric fuse? (a) Low resistance, low melting point (b) High resistance, high melting point. (c) High resistance, low melting point (d) Low resistance, high melting point

Answer: (c) High resistance, low melting point

(iii) When the current is doubled in a heating device and time is halved, the heat energy produced is

Answer: (a) doubled ​

(iv) A fuse wire melts at 5 A. It is is desired that the fuse wire of same material melt at 10 A. The new radius of the wire is

Answer: (b) 2 times ​

(v) When a current of 0.5 A passes through a conductor for 5 min and the resistance of conductor is 10 ohm, the amount of heat produced is

Answer: (c) 750J ​

Question 2:

The relationship between potential difference and the current was first established by George Simon Ohm. This relationship is known as Ohm’s law. According to this law, the current passed through a conductor is proportional to the potential difference applied between its ends provided the temperature remains constant i.e. I ∝ V or V = IR where R is the constant for the conductor and it is known as the resistance of the conductor. Although Ohm’s law has been found valid over a large class of materials, there are some materials that do not hold Ohm’s law.

2.1) Name the law which is illustrated by the VI graph. (a) Lenz law (b) Faraday’s law (c) Ohm’s law (d) Newton’s law

Answer(c) Ohm’s law

2.2) By increasing the voltage across a conductor, the (a) current will decrease (b) current will increase (c) resistance will increase (d) resistance will decrease

Answer(b) current will increase

2.3) When a battery of 9 V is connected across a conductor and the current flows is 0.1 A, the resistance is (a) 9 Ohm (b) 0.9 Ohm (c) 90 Ohm (d) 900 Ohm

Answer(c) 90 Ohm​

2.4) If both the potential difference and resistance in a circuit are doubled then : (a) current remains same (b) current becomes double (c) current becomes zero (d) current becomes half

Answer(a) current remains same

2.5) Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become : (a) double (b) half (c) one fourth (d) 4 time

Answer(b) half

Case Study 3

3.1) The current passing through an electric kettle has been doubled. The heat produced will become : (a) half (b) double (c) four times (d) one fourth

Answer(c) four times

3.2) The heat produced in a wire of resistance ‘a’ when a current ‘b’ flows through it in time ‘c’ is given by : (a) a 2 bc (b) abc 2 (c) ab 2 c (d) abc

Answer(c) ab2c

3.3) What are the properties of heating element ? (a) high resistance, high melting point (b) low resistance, high melting point (c) low resistance, high melting point (d) low resistance, low melting point

Answer (a) high resistance, high melting point

3.4) Calculate the heat produced when 96,000 coulombs of charge is transferred in one hour through a potential difference of 50 volts. (a) 4788 J (b) 4788 kJ (c) 478 kJ (d) 478 J

Answer (b) 4788 kJ

3.5) Which of the following characteristic is not suitable for a fuse wire ? (a) thin and short (b) low melting point (c) thick and short (d) high resistance

Answer (c) thick and short

Case Study 4

Substance through which charges cannot pass is called insulators. Glass, pure water, and all gases are insulators. Insulators are also called dielectrics. In insulators, the electrons are strongly bound to their atoms and cannot get themselves freed. Thus, free electrons are absent in insulators. Insulators can easily be charged by friction. This is due to the reason that when an electric charge is given to an insulator, it is unable to move freely and remains localized. But this does not mean that conductors cannot be charged. A metal rod can be charged by rubbing it with silk if it is held in a handle of glass or amber

4.1) Calculate the current in a wire if a 1500 C charge is passed through it in 5 minutes. (a) 2 A (b) 5 A (c) 3 A (d) 4 A

Answer (b) 5 A

4.2) Electrons and conventional current flows in : (a) The same direction (b) The opposite direction (c) Any direction (d) Can’t say

Answer (b) The opposite direction

4.3) If the current passing through a lamp is 5 A, what charge passes in 10 second ? (a) 0.5 C (b) 3 C (c) 5 C (d) 50 C

Answer (d) 50 C

4.4) One-coulomb charge is equivalent to the charge contained in : (a) 6.2 × 10 19  electrons (b) 2.6 × 10 18  electrons (c) 2.65 × 10 19  electrons (d) 6.25 × 10 18  electrons

Answer (d) 6.25 × 1018 electrons

4.5) When an electric lamp is connected to 12 V battery, it draws a current of 0.5 A. The power of the lamp is :  (a) 0.5 W (b) 6 W (c) 12 W (d) 24 W

Answer (b) 6 W

Hope the information shed above regarding Case Study and Passage Based Questions for Class 10 Science Chapter 12 Electricity with Answers Pdf free download has been useful to an extent. If you have any other queries of CBSE Class 10 Science Electricity Case Study and Passage Based Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible By Team Study Rate

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