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# CBSE Physics Sample Paper Class 12th 2018

Posted On 2018-02-01 Sample Question Paper (PHYSICS)

CLASS-XII (2017-18)

Time Allowed: 3Hours                                                                                                                                                                                   Maximum Marks: 70

General Instructions

1. All questions are compulsory. There are 26 questions in all.

2. This question paper has five sections: Section A, Section B, Section C, Section D and Section E.

3. Section A contains five questions of one mark each, Section B contains five questions of two marks each, Section C contains twelve questions of three marks each, Section D contains one value based question of four marks and Section E contains three questions of five marks each.

4. There is no overall choice. However, an internal choice has been provided in one question of two marks, one question of three marks and all the three questions of five marks weightage. You have to attempt only one of the choices in such questions.

5. You may use the following values of physical constants wherever necessary.

c = 3 X 108 m/s

h = 6.63 X 10-34 Js

e = 1.6 X 10-19 C

μ o = 4 X 10-7 T m A -1

ε0 = 8.854 X 10-12 C2 N -1 m -2

1/4πε0 = 9 X 109 N m 2 C -2

me = 9.1 X 10-31 kg

mass of neutron = 1.675 X 10-27 kg

mass of proton = 1.673 X 10-27 kg

Avogadro’s number = 6.023 X 1023 per gram mole

Boltzmann constant = 1.38 X 10-23 JK -1

Section – A

1. Do electromagnetic waves carry energy and momentum?

2. What is the relation between electric field at a point and a point charge q.

3. Draw logic symbol of NAND gate and write its truth table.

4. State the condition under which a large magnification can be achieved in an astronomical telescope.

5. Define electric flux. Write its SI unit.