KHAITAN PUBLIC SCHOOL, SAHIBABAD
SESSION: 2025-26
SUBJECT- PHYSICS (042)
CLASS – XII
TERM-1 EXAMINATION
TIME: 3 hrs. SET-A M.M: 70
General Instruction:
(1) There are 33 questions in all. All questions are compulsory.
(2) This question paper has five sections: Section A, Section B, Section C, Section D and Section E.
(3) All the sections are compulsory.
(4) Section A contains sixteen questions, twelve MCQ and four assertion reasoning based of 1 mark
each, Section B contains five questions of two marks each, Section C contains seven questions of
three marks each, Section D contains three long answer questions of five marks each and Section E
contains two case study-based questions of four marks each.
(5) There is no overall choice. However, an internal choice has been provided. You have to attempt
only one of the choices in such questions.
(6) Use of calculators is not allowed.
Section – A
All questions are compulsory (1mark each). In case of internal choices, attempt any one of them.)
1. Two parallel infinite line charges +λ and –λ are placed with a separation distance R in free space. The 1
net electric field exactly mid-way between the two line charges is:
2λ λ λ
a) Zero b) c) d)
πεR πεR 2 πεR
2. In the circuit shown, current flowing through 25 V cell is: 1
a) 7.2A b) 10A c) 12A d) 14.2A
3. A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the 1
charging battery the distance between the plates of capacitor is increased using an insulating handle. As a
result the potential difference between the plates:
a) Increases b) decreases c) does not change d) becomes zero
4. The magnetic moment associated with a circular coil of 35 turns and radius 25cm, if it carries a current of 1
11 A is:
a) 72.2 Am2 b) 70.5 Am2 c) 74.56 Am2 d) 75.56 Am2
5. A circular loop of radius R carrying a current I is placed in a uniform magnetic field B perpendicular to 1
the loop. The force on the loop is:
a) 2πRIB b) 2πRI2B3 c) πR2IB d) zero
6. The relative permeability of iron is 6000. Its magnetic susceptibility is: 1
a) 5999 b) 6001 c) 6000 x 10-7 d) 6000 x 10 7
7. An ammeter of resistance 0.81 ohm reads up to 1 A. The value of the required shunt to increase the range 1
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, to 10 A is:
a) 0.9 ohm b) 0.09 ohm c) 0.03 ohm d) 0.3 ohm
8. S.I. unit of magnetic pole strength is: 1
a) Ampere/meter b) Ampere-meter c) volt/meter d) Ampere/meter2.
9. The magnetic susceptibility of a paramagnetic substance at -173 C is 1.5 x 10 then its value at -730C is
0 -2
1
(a) 7.5x 10-1 b) 7.5x 10-2 c) 7.5x 10-3 d) 7.5 x 10-4
10. A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane 1
perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1mm/s. The
induced EMF when the radius is 2cm , is:
a) 2π μ V b) π μ V c) 0.5 π μ V d) 2 μ V
11. A 100 mH coil carries a current of 1 A. Energy stored in form of magnetic field is: 1
a) 0.5 J b) 0.05 J c) 1J d) 0.1 J
12. The coefficient of mutual inductance of two coils depends on: 1
a) Medium between the coils c) Distance between the two coils
b) Orientation of the two coils d) All of these
Directions: These questions consist of two statements, each printed as Assertion and Reason. While
answering these questions, you are required to choose any one of the following responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If Assertion incorrect and Reason are correct.
(e) If both the Assertion and Reason are incorrect.
13. Assertion- Increase the current sensitivity of a galvanometer necessarily increase the voltage sensitivity. 1
Reason- Voltage sensitivity is inversely proportional to current sensitivity.
14. Assertion- The power in ac circuit is minimum if the circuit has only a resistor 1
Reason- Power of a circuit is independent of the phase angle.
15. Assertion- It is more difficult to push a magnet into a coil with more loops. 1
Reason- Emf induced in the current loop resists the motion of the magnet.
16. Assertion- Drift velocity of electrons is independent of time. 1
Reason- Electrons are accelerated in the presence of electric field.
SECTION – B
(All questions are compulsory (2 mark each). In case of internal choices, attempt any one of them.)
17. Two small identical electrical dipoles AB and CD, each of dipole moment ‘p’ are kept at an angle of 2
120° as shown in the figure. What is the resultant dipole moment of this combination? If this system is
subjected to electric field (E) directed along + X direction, what will be the magnitude and direction of
the torque acting on this?
18. A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is 2
connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?
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SESSION: 2025-26
SUBJECT- PHYSICS (042)
CLASS – XII
TERM-1 EXAMINATION
TIME: 3 hrs. SET-A M.M: 70
General Instruction:
(1) There are 33 questions in all. All questions are compulsory.
(2) This question paper has five sections: Section A, Section B, Section C, Section D and Section E.
(3) All the sections are compulsory.
(4) Section A contains sixteen questions, twelve MCQ and four assertion reasoning based of 1 mark
each, Section B contains five questions of two marks each, Section C contains seven questions of
three marks each, Section D contains three long answer questions of five marks each and Section E
contains two case study-based questions of four marks each.
(5) There is no overall choice. However, an internal choice has been provided. You have to attempt
only one of the choices in such questions.
(6) Use of calculators is not allowed.
Section – A
All questions are compulsory (1mark each). In case of internal choices, attempt any one of them.)
1. Two parallel infinite line charges +λ and –λ are placed with a separation distance R in free space. The 1
net electric field exactly mid-way between the two line charges is:
2λ λ λ
a) Zero b) c) d)
πεR πεR 2 πεR
2. In the circuit shown, current flowing through 25 V cell is: 1
a) 7.2A b) 10A c) 12A d) 14.2A
3. A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the 1
charging battery the distance between the plates of capacitor is increased using an insulating handle. As a
result the potential difference between the plates:
a) Increases b) decreases c) does not change d) becomes zero
4. The magnetic moment associated with a circular coil of 35 turns and radius 25cm, if it carries a current of 1
11 A is:
a) 72.2 Am2 b) 70.5 Am2 c) 74.56 Am2 d) 75.56 Am2
5. A circular loop of radius R carrying a current I is placed in a uniform magnetic field B perpendicular to 1
the loop. The force on the loop is:
a) 2πRIB b) 2πRI2B3 c) πR2IB d) zero
6. The relative permeability of iron is 6000. Its magnetic susceptibility is: 1
a) 5999 b) 6001 c) 6000 x 10-7 d) 6000 x 10 7
7. An ammeter of resistance 0.81 ohm reads up to 1 A. The value of the required shunt to increase the range 1
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, to 10 A is:
a) 0.9 ohm b) 0.09 ohm c) 0.03 ohm d) 0.3 ohm
8. S.I. unit of magnetic pole strength is: 1
a) Ampere/meter b) Ampere-meter c) volt/meter d) Ampere/meter2.
9. The magnetic susceptibility of a paramagnetic substance at -173 C is 1.5 x 10 then its value at -730C is
0 -2
1
(a) 7.5x 10-1 b) 7.5x 10-2 c) 7.5x 10-3 d) 7.5 x 10-4
10. A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane 1
perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1mm/s. The
induced EMF when the radius is 2cm , is:
a) 2π μ V b) π μ V c) 0.5 π μ V d) 2 μ V
11. A 100 mH coil carries a current of 1 A. Energy stored in form of magnetic field is: 1
a) 0.5 J b) 0.05 J c) 1J d) 0.1 J
12. The coefficient of mutual inductance of two coils depends on: 1
a) Medium between the coils c) Distance between the two coils
b) Orientation of the two coils d) All of these
Directions: These questions consist of two statements, each printed as Assertion and Reason. While
answering these questions, you are required to choose any one of the following responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If Assertion incorrect and Reason are correct.
(e) If both the Assertion and Reason are incorrect.
13. Assertion- Increase the current sensitivity of a galvanometer necessarily increase the voltage sensitivity. 1
Reason- Voltage sensitivity is inversely proportional to current sensitivity.
14. Assertion- The power in ac circuit is minimum if the circuit has only a resistor 1
Reason- Power of a circuit is independent of the phase angle.
15. Assertion- It is more difficult to push a magnet into a coil with more loops. 1
Reason- Emf induced in the current loop resists the motion of the magnet.
16. Assertion- Drift velocity of electrons is independent of time. 1
Reason- Electrons are accelerated in the presence of electric field.
SECTION – B
(All questions are compulsory (2 mark each). In case of internal choices, attempt any one of them.)
17. Two small identical electrical dipoles AB and CD, each of dipole moment ‘p’ are kept at an angle of 2
120° as shown in the figure. What is the resultant dipole moment of this combination? If this system is
subjected to electric field (E) directed along + X direction, what will be the magnitude and direction of
the torque acting on this?
18. A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is 2
connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?
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