# Case Study Questions Class 12 Physics

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CBSE will ask two Case Study Questions in the CBSE class 12 Physics questions paper. The question number 15 and 16 are cased based questions where 5 MCQs will be asked based on a paragraph. Each theme will have five questions and students will have a choice to attempt any four of them.

## You can Score High

This year’s class 12 Physics question paper will carry 33 questions for 70 marks. Certainly, the question paper is a bit easier this year. It is because 30% syllabus is already reduced and there are more internal choices. Besides this, the case study questions are a plus to win the game with good marks.

In simple words, all circumstances are in favour of the sincere students who are working hard to score high this year. Although it has been a difficult time for students as they were not getting the personal attention of the teachers. We know that online classes have their own limits but still, we expect better scores this year especially from students who are putting some extra effort into their studies.

## Case Study Questions

There are a number of study apps available over the internet. But if you are a CBSE student and willing to get an app for the CBSE curriculum, you have very limited options. And if you want an app that is specifically designed for CBSE students, your search will definitely end on finding myCBSEguide. Case study questions are the latest updates in CBSE syllabus. It is exclusively available in myCBSEguide app.

Here are some example questions. For more questions, you can download myCBSEguide App.

Read  the following source and answer any four out of the following questions:
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of charges positive and negative charges. Also, like charges repel each other whereas unlike charges attract each other.

1. Charge on a body which carries 200 excess electrons is:
1. -3.2 ×× 10-18 C
2. 3.2 ×× 10 18 C
3. -3.2 ×× 10-17 C
4. 3.2 ×× 10 -17  C
2. Charge on a body  which carries 10 excess electrons is:
1. -1.6 ×× 10-18 C
2. 1.6 ×× 10 -18 C
3. 2.6 ×× 10-18 C
4. 1.6 ×× 10-21 C
3. Mass of electron is:
1. 9.1 ×× 10-31 kg
2. 9.1 ×× 10-31 g
3. 1.6 ×× 10-19 kg
4. 1.6 ×× 10-19 g
4. A body is positively charged, it implies that:
1. there is only a positive charge in the body
2. there is positive as well as negative charge in the body but the positive charge is more than negative charge
3. there is equally positive and negative charge in the body but the positive charge lies in the outer regions
4. the negative charge is displaced from its position
5. On rubbing, when one body gets positively charged and other negatively charged, the electrons transferred from positively charged body to negatively charged body are:
1. valence electrons only
2. electrons of inner shells
3. both valence electrons and electrons of the inner shell.
4. none of the above

Read the following source and answer any four out of the following questions:
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms. Also Resistivity, the electrical resistance of a conductor of unit cross-sectional area, and unit length. … A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents.

1. Resistivity is independent of:
1. nature of material
2. temperature
3. dimensions of material
4. none of the above
2. As compare to short wires, long wires have _______ resistance.
1. more
2. less
3. same
4. zero
3. As compare to thin wires, thick wires have _______ resistance.
1. more
2. less
3. same
4. zero
4. The resistance of a wire depends upon:
1. cross-sectional area
2. length of wire
3. wire’s nature
4. all of the above
5. A copper wire having the same size as steel wire have:
1. more resistance
2. less resistance
3. same resistance
4. none of the above

Read the source given below and answer any four out of the following questions:
The Bohr model of the atom was proposed by Neil Bohr in 1915. It came into existence with the modification of Rutherford’s model of an atom. Rutherford’s model introduced the nuclear model of an atom, in which he explained that a nucleus (positively charged) is surrounded by negatively charged electrons.

1. Which of the following statements does not form a part of Bohr’s model of a hydrogen atom?
1. The energy of the electrons in the orbit is quantized
2. The electron in the orbit nearest the nucleus has the lowest energy
3. Electrons revolve in different orbits around the nucleus
4. The position and velocity of the electrons in the orbit cannot be determined simultaneously
2. What is in the center of the Rutherford model?
1. Single proton
2. Multiple electrons
3. A nucleus
4. Neutrons
3. When an electron jumps from its orbit to another orbit, energy is:
1. emitted only
2. absorbed only
3. both (a) and (b)
4. none of these
4.  How were the limitations of the Rutherford model which could not explain the observed features of atomic spectra explained in Bohr’s model of a hydrogen atom?
1.  It must emit a continuous spectrum
2.  It loses its energy
3. Gaining its energy
4. A discrete spectrum
5. When electron remains between orbits its momentum is:
1. quantized
2. emitted
3. dequantized
4. none of the above