Class 12th Physics Practice Previous year question paper

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Series : WX7ZY/7 SET ~ 3
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Roll No. Q.P. Code 55/7/3
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Candidates must write the Q.P. Code
on the title page of the answer-book.

^m¡{VH$ {dkmZ (g¡ÕmpÝVH$)
PHYSICS (Theory)
3 70
Time allowed : 3 hours Maximum Marks : 70

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(I) - 31
Please check that this question paper contains 31 printed pages.
(II) - - - -

Q.P. Code given on the right hand side of the question paper should be
written on the title page of the answer-book by the candidate.
(III) - 33
Please check that this question paper contains 33 questions.
(IV) , -
Please write down the Serial Number of the question in the
answer-book at the given place before attempting it.
(V) - 15 -
10.15 10.15 10.30 -
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15 minute time has been allotted to read this question paper. The
question paper will be distributed at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the candidates will read the question paper only and will not
write any answer on the answer-book during this period.


55/7/3 Page 1 of 31 P.T.O.

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(i) - 33
(ii) - , , ,
(iii) 1 16 1
(iv) 17 21 - 2


(v) 22 28 - 3
(vi) 29 30 - 4
(vii) 31 33 - 5
(viii) - ,

(ix) -
(x)


c=3 108 m/s
h = 6.63 10 34 Js
e = 1.6 10 19 C

0 =4 10 7 T m A 1

0 = 8.854 10 12 C2 N 1 m 2

=9 109 N m2 C 2


(me) = 9.1 10 31 kg

= 1.675 10 27 kg

= 1.673 10 27 kg

= 6.023 1023

= 1.38 10 23 JK 1


55/7/3 Page 2 of 31

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General Instructions :
Read the following instructions carefully and follow them :
(i) This question paper contains 33 questions. All questions are compulsory.
(ii) This question paper is divided into five sections Sections A, B, C, D and E.
(iii) In Section A Questions no. 1 to 16 are Multiple Choice type questions. Each
question carries 1 mark.
(iv) In Section B Questions no. 17 to 21 are Very Short Answer type questions.
Each question carries 2 marks.
(v) In Section C Questions no. 22 to 28 are Short Answer type questions. Each
question carries 3 marks.
(vi) In Section D Questions no. 29 and 30 are case study-based questions. Each
question carries 4 marks.
(vii) In Section E Questions no. 31 to 33 are Long Answer type questions. Each
question carries 5 marks.
(viii) There is no overall choice given in the question paper. However, an internal
choice has been provided in few questions in all the Sections except Section A.
(ix) Kindly note that there is a separate question paper for Visually Impaired
candidates.
(x) Use of calculators is not allowed.
You may use the following values of physical constants wherever necessary :
c=3 108 m/s
h = 6.63 10 34 Js
e = 1.6 10 19 C

0 =4 10 7 T m A 1

0 = 8.854 10 12 C2 N 1 m 2

=9 109 N m2 C 2


Mass of electron (me) = 9.1 10 31 kg

Mass of neutron = 1.675 10 27 kg
Mass of proton = 1.673 10 27 kg
6.023 1023 per gram mole
Boltzmann constant = 1.38 10 23 JK 1

55/7/3 Page 3 of 31 P.T.O.

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1. 20 F 50 C 12 F




(A) 20 C (B) 20 C
(C) 30 C (D) 30 C

2.
:
(A)

(B)

(C)

(D)

3. t I
0·5 C 2I


(A) 1·0 C (B) 1·5 C
(C) 2·0 C (D) 4·0 C

4. -
(A) [M L T 2 A 2]
(B) [M L2 T 1 A 1]
(C) [M L 1 T 2 A 2]
(D) [M L2 T 2 A 2]
55/7/3 Page 4 of 31