Class XII Session 2025-26
Subject - Physics
Time Allowed: 3 hours Maximum Marks: 70
General Instructions:
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 two case study based questions of four marks each and Section E contains three long answer questions of
five marks each.
5. There is no overall choice. However, an internal choice has been provided in one question in Section B, one
question in Section C, one question in each CBQ in Section D and all three questions in Section E. You have to
attempt only one of the choices in such questions.
6. Use of calculators is not allowed.
Section A
1. The cations and anions are arranged in alternate form in [1]
a)ionic crystal b)semiconductor crystal
c)covalent crystal d)metallic crystal
2. Current density of a conductor is [1]
a)Is always zero b)the net charge flowing through the area
c)measure of the flow of electric charge in d)the net charge flowing through the area per
amperes per unit area of cross-section unit time
3. The focal length of a concave mirror is f. An object is placed at a distance x from the focus. The magnification is [1]
a) f b) (f+x)
(f+x) f
c) f d) x
x
f
4. A magnet of magnetic moment M is suspended in a uniform magnetic field B. The maximum value of torque [1]
acting on the magnet is
a) zero b) MB
c) 2MB d) 21MB
5. A parallel plate capacitor of plate area A has a charge Q. The force on each plate of the capacitor is [1]
Page 1 of 19
, a) 2q2 b) zero
ϵoA
c) q2 d) q2
ϵoA 2ϵoA
6. An electron is travelling along the X-direction. It encounters a magnetic field in the Y-direction. Its subsequent [1]
motion will be:
a)a circle in the YZ-plane b)straight line along the X-direction
c)a circle in the XZ-plane d)a circle in the XY-plane
7. A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 [1]
s, change of flux linkage with the other coil is
a)45 Wb b)35 Wb
c)30 Wb d)40 Wb
8. An aeroplane having a wingspan of 35m files due north with the speed of 90 m/s, given B = 4× 10-5 T. The [1]
potential difference between the tips of the wings will be
a)0.126 V b)1.26 V
c)0.013 V d)12.6 V
9. The shape of the wavefront of the portion of the wavefront of light from a distant star intercepted by the earth is [1]
a) plane b) spherical
c) conical d) hyperboloid
10. If an electron is accelerated by 8.8×1014m/s2, then electric field required for acceleration is (given specific [1]
charge of the electron = 1.76×1011Ckg−1)
a)52 V cm−1 b)50 V cm−1
c)54 V cm−1 d)56 V cm−1
11. In the circuit given in the figure, an a.c. source of 200 V is connected through a diode D to a capacitor. The [1]
potential difference across the capacitor will be
a)283 V b)100 V
c)310 V d)200 V
∘
12. Green light of wavelength 5,460 A is incident on an air-glass interface. If the refractive index of glass is 1⋅5,[1]
the wavelength of light in glass would be (Given that the velocity of light in air, c = 3 × 108 m s-1)
∘ ∘
a) 6731 A b)3,640 A
∘ ∘
c) 5,460 A d)4,861 A
13. Assertion (A): The photoelectrons produced by a monochromatic light beam incident on a metal surface, have a [1]
spread in their kinetic energies.
Reason (R): The work function of the metal varies as a function of depth from the surface.
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, a)Both A and R are true and R is the correct b)Both A and R are true but R is not the
explanation of A. correct explanation of A.
c)A is true but R is false. d)A is false but R is true.
14. Assertion: For a charged particle moving from point P to point Q, the net work done by an electrostatic field on [1]
the particle is independent of the path connecting point P to point Q.
Reason: The net work done by a conservative force on an object moving along a closed loop is zero.
a)Assertion and reason both are correct b)Assertion and reason both are correct
statements and reason is correct explanation statements but reason is not correct
for assertion. explanation for assertion.
c)Assertion is correct statement but reason is d)Assertion is wrong statement but reason is
wrong statement. correct statement.
15. Assertion (A): Light added to light can produce darkness. [1]
Reason (R): When two coherent light waves interfere, there is darkness at position of destructive interference.
a)Both A and R are true and R is the correct b)Both A and R are true but R is not the
explanation of A. correct explanation of A.
c)A is true but R is false. d)A is false but R is true.
16. Assertion (A): A step-up transformer cannot be used as a step-down transformer. [1]
Reason (R): A transformer works only in one direction.
a)Both A and R are true and R is the correct b)Both A and R are true but R is not the
explanation of A. correct explanation of A.
c)A is true but R is false. d)A is false but R is true.
Section B
17. A light beam travelling in the x-direction is described by the electric field: Ey = 270 sin
t ω(−x
). An electron [2]
c
is constrained to move along the y-direction with a speed of 2.0 × 107 ms-1. Find the maximum electric force
and maximum magnetic force on the electron.
18. A uniform magnetic field gets modified as shown below, when two specimens X and Y are placed in it. [2]
i. Identify the two specimens X and Y.
ii. State the reason for the behaviour of the field lines in X and Y.
19. Explain the formation of potential barrier and depletion region in a p-n junction diode. What is effect of applying [2]
forward bias on the width of depletion region?
o
20. [2]
If the short series limit of the Balmer series for hydrogen is 3646A, calculate the atomic number of the element
o
which gives X-ray wavelengths down to 1.0A. Identify the element.
21. a. An electron moving horizontally with a velocity of 4 × 104 m/s enters a region of uniform magnetic field[2]
of
10-5 T acting vertically upward as shown in the figure. Draw its trajectory and find out the time it takes to
Page 3 of 19
Subject - Physics
Time Allowed: 3 hours Maximum Marks: 70
General Instructions:
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 two case study based questions of four marks each and Section E contains three long answer questions of
five marks each.
5. There is no overall choice. However, an internal choice has been provided in one question in Section B, one
question in Section C, one question in each CBQ in Section D and all three questions in Section E. You have to
attempt only one of the choices in such questions.
6. Use of calculators is not allowed.
Section A
1. The cations and anions are arranged in alternate form in [1]
a)ionic crystal b)semiconductor crystal
c)covalent crystal d)metallic crystal
2. Current density of a conductor is [1]
a)Is always zero b)the net charge flowing through the area
c)measure of the flow of electric charge in d)the net charge flowing through the area per
amperes per unit area of cross-section unit time
3. The focal length of a concave mirror is f. An object is placed at a distance x from the focus. The magnification is [1]
a) f b) (f+x)
(f+x) f
c) f d) x
x
f
4. A magnet of magnetic moment M is suspended in a uniform magnetic field B. The maximum value of torque [1]
acting on the magnet is
a) zero b) MB
c) 2MB d) 21MB
5. A parallel plate capacitor of plate area A has a charge Q. The force on each plate of the capacitor is [1]
Page 1 of 19
, a) 2q2 b) zero
ϵoA
c) q2 d) q2
ϵoA 2ϵoA
6. An electron is travelling along the X-direction. It encounters a magnetic field in the Y-direction. Its subsequent [1]
motion will be:
a)a circle in the YZ-plane b)straight line along the X-direction
c)a circle in the XZ-plane d)a circle in the XY-plane
7. A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 [1]
s, change of flux linkage with the other coil is
a)45 Wb b)35 Wb
c)30 Wb d)40 Wb
8. An aeroplane having a wingspan of 35m files due north with the speed of 90 m/s, given B = 4× 10-5 T. The [1]
potential difference between the tips of the wings will be
a)0.126 V b)1.26 V
c)0.013 V d)12.6 V
9. The shape of the wavefront of the portion of the wavefront of light from a distant star intercepted by the earth is [1]
a) plane b) spherical
c) conical d) hyperboloid
10. If an electron is accelerated by 8.8×1014m/s2, then electric field required for acceleration is (given specific [1]
charge of the electron = 1.76×1011Ckg−1)
a)52 V cm−1 b)50 V cm−1
c)54 V cm−1 d)56 V cm−1
11. In the circuit given in the figure, an a.c. source of 200 V is connected through a diode D to a capacitor. The [1]
potential difference across the capacitor will be
a)283 V b)100 V
c)310 V d)200 V
∘
12. Green light of wavelength 5,460 A is incident on an air-glass interface. If the refractive index of glass is 1⋅5,[1]
the wavelength of light in glass would be (Given that the velocity of light in air, c = 3 × 108 m s-1)
∘ ∘
a) 6731 A b)3,640 A
∘ ∘
c) 5,460 A d)4,861 A
13. Assertion (A): The photoelectrons produced by a monochromatic light beam incident on a metal surface, have a [1]
spread in their kinetic energies.
Reason (R): The work function of the metal varies as a function of depth from the surface.
Page 2 of 19
, a)Both A and R are true and R is the correct b)Both A and R are true but R is not the
explanation of A. correct explanation of A.
c)A is true but R is false. d)A is false but R is true.
14. Assertion: For a charged particle moving from point P to point Q, the net work done by an electrostatic field on [1]
the particle is independent of the path connecting point P to point Q.
Reason: The net work done by a conservative force on an object moving along a closed loop is zero.
a)Assertion and reason both are correct b)Assertion and reason both are correct
statements and reason is correct explanation statements but reason is not correct
for assertion. explanation for assertion.
c)Assertion is correct statement but reason is d)Assertion is wrong statement but reason is
wrong statement. correct statement.
15. Assertion (A): Light added to light can produce darkness. [1]
Reason (R): When two coherent light waves interfere, there is darkness at position of destructive interference.
a)Both A and R are true and R is the correct b)Both A and R are true but R is not the
explanation of A. correct explanation of A.
c)A is true but R is false. d)A is false but R is true.
16. Assertion (A): A step-up transformer cannot be used as a step-down transformer. [1]
Reason (R): A transformer works only in one direction.
a)Both A and R are true and R is the correct b)Both A and R are true but R is not the
explanation of A. correct explanation of A.
c)A is true but R is false. d)A is false but R is true.
Section B
17. A light beam travelling in the x-direction is described by the electric field: Ey = 270 sin
t ω(−x
). An electron [2]
c
is constrained to move along the y-direction with a speed of 2.0 × 107 ms-1. Find the maximum electric force
and maximum magnetic force on the electron.
18. A uniform magnetic field gets modified as shown below, when two specimens X and Y are placed in it. [2]
i. Identify the two specimens X and Y.
ii. State the reason for the behaviour of the field lines in X and Y.
19. Explain the formation of potential barrier and depletion region in a p-n junction diode. What is effect of applying [2]
forward bias on the width of depletion region?
o
20. [2]
If the short series limit of the Balmer series for hydrogen is 3646A, calculate the atomic number of the element
o
which gives X-ray wavelengths down to 1.0A. Identify the element.
21. a. An electron moving horizontally with a velocity of 4 × 104 m/s enters a region of uniform magnetic field[2]
of
10-5 T acting vertically upward as shown in the figure. Draw its trajectory and find out the time it takes to
Page 3 of 19
