PRE-BOARD EXAMINATION AY 2025-26
CLASS:XII SUBJECT: PHYSICS
Sub Code: 042
TIME: 3 Hrs MAX.MARKS: 70
General Instructions:
1. There are 33 questions in all. All questions are compulsory. Maximum Marks: 70
2. This question paper has five sections: Section A, Section B, Section C, Section D and Section E.
3. Section A contains sixteen questions, twelve MCQ and four assertion reasoning based of 1 mark each,
4. Section B contains five questions of two marks each, Section C contains seven questions of three marks
each,
5. Section D contains two case study-based questions of four marks each and
6. Section E contains three long answer questions of five marks each. There is no overall choice.
7. However, an internal choice has been provided in two question in Section B, one question in Section C and
all three questions in Section E.
8. You have to attempt only one of the choices in such questions.
9. Use of calculators is not allowed.
SECTION-A M
An electric dipole placed in an electric field of intensity 2 × 105 N/C at an angle of 30° experiences a
torque equal to 4 Nm. The charge on the dipole of dipole length 2 cm is 1
1
(a) 7 µC (b) 8 m C (c) 2 m C (d) 5 m C
A cell of constant emf is first connected to a resistance R1 and then connected to a resistance R2. If
power delivered in both cases is same, then the internal resistance of the cell is:
2 1
During the propagation of electromagnetic waves in a medium,
(a) electric energy density is double of the magnetic energy density
(b) electric energy density is half of the magnetic energy density 1
3
(c) electric energy density is equal to the magnetic energy density
(d) Both electric and magnetic energy densities are zero
An electron is moving along positive x-axis in a magnetic field which is parallel to the positive y-
4 axis. In what direction will the magnetic force be acting on the electron? 1
(a) Along -x axis (b) Along -z axis (c ) Along +z axis (d) Along -y axis
Page 1 of 9
, An ammeter of resistance 0.81 ohm reads up to 1 A. The value of the required shunt to increase the
5 range to 10 A is 1
(a) 0.9 ohm (b ) 0.09 ohm (c) 0.03 ohm (d) 0.3 ohm
A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the
electric field vector at a certain point in space is 6 Vm-1, what is the magnetic field vector at that
point? 1
6
(a) 2 × 10-8 T (b) (c) 2T (d) ½ T
The electrostatic potential on the surface of a charged conducting sphere is 100V. Two statements
are made in this regard:
S1: At any point inside the sphere, electric intensity is zero.
S2: At any point inside the sphere, the electrostatic potential is 100V.
7 Which of the following is a correct statement? 1
(a) S1 is true but S2 is false.
(b) Both S1 & S2 are false.
(c) S1 is true, S2 is also true and S1 is the cause of S2.
(d) S1 is true, S2 is also true but the statements are independent.
An electron with angular momentum L moving around the nucleus has a magnetic moment given by 1
8
(a) e L/ 2m (b) e L/3m (c) e L /4m (d) e L / m
Two waves from a pair of coherent sources strike the screen at a point. For which of the following
cases will the intensity of superimposed waves be maximum and hence resulting in constructive i
nterference at the given point of observation?
9 1
a) Path difference = 3λ/2; 4λ/2 & Phase difference = 5π
b) Path difference = 4λ/2 & Phase difference = 0,+5π
c) Path difference = 3λ; 3λ/2 & Phase difference = ‐2π, 5π
d) Path difference = 3λ; 4λ/2 & Phase difference = 0, ‐2π
Page 2 of 9
CLASS:XII SUBJECT: PHYSICS
Sub Code: 042
TIME: 3 Hrs MAX.MARKS: 70
General Instructions:
1. There are 33 questions in all. All questions are compulsory. Maximum Marks: 70
2. This question paper has five sections: Section A, Section B, Section C, Section D and Section E.
3. Section A contains sixteen questions, twelve MCQ and four assertion reasoning based of 1 mark each,
4. Section B contains five questions of two marks each, Section C contains seven questions of three marks
each,
5. Section D contains two case study-based questions of four marks each and
6. Section E contains three long answer questions of five marks each. There is no overall choice.
7. However, an internal choice has been provided in two question in Section B, one question in Section C and
all three questions in Section E.
8. You have to attempt only one of the choices in such questions.
9. Use of calculators is not allowed.
SECTION-A M
An electric dipole placed in an electric field of intensity 2 × 105 N/C at an angle of 30° experiences a
torque equal to 4 Nm. The charge on the dipole of dipole length 2 cm is 1
1
(a) 7 µC (b) 8 m C (c) 2 m C (d) 5 m C
A cell of constant emf is first connected to a resistance R1 and then connected to a resistance R2. If
power delivered in both cases is same, then the internal resistance of the cell is:
2 1
During the propagation of electromagnetic waves in a medium,
(a) electric energy density is double of the magnetic energy density
(b) electric energy density is half of the magnetic energy density 1
3
(c) electric energy density is equal to the magnetic energy density
(d) Both electric and magnetic energy densities are zero
An electron is moving along positive x-axis in a magnetic field which is parallel to the positive y-
4 axis. In what direction will the magnetic force be acting on the electron? 1
(a) Along -x axis (b) Along -z axis (c ) Along +z axis (d) Along -y axis
Page 1 of 9
, An ammeter of resistance 0.81 ohm reads up to 1 A. The value of the required shunt to increase the
5 range to 10 A is 1
(a) 0.9 ohm (b ) 0.09 ohm (c) 0.03 ohm (d) 0.3 ohm
A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the
electric field vector at a certain point in space is 6 Vm-1, what is the magnetic field vector at that
point? 1
6
(a) 2 × 10-8 T (b) (c) 2T (d) ½ T
The electrostatic potential on the surface of a charged conducting sphere is 100V. Two statements
are made in this regard:
S1: At any point inside the sphere, electric intensity is zero.
S2: At any point inside the sphere, the electrostatic potential is 100V.
7 Which of the following is a correct statement? 1
(a) S1 is true but S2 is false.
(b) Both S1 & S2 are false.
(c) S1 is true, S2 is also true and S1 is the cause of S2.
(d) S1 is true, S2 is also true but the statements are independent.
An electron with angular momentum L moving around the nucleus has a magnetic moment given by 1
8
(a) e L/ 2m (b) e L/3m (c) e L /4m (d) e L / m
Two waves from a pair of coherent sources strike the screen at a point. For which of the following
cases will the intensity of superimposed waves be maximum and hence resulting in constructive i
nterference at the given point of observation?
9 1
a) Path difference = 3λ/2; 4λ/2 & Phase difference = 5π
b) Path difference = 4λ/2 & Phase difference = 0,+5π
c) Path difference = 3λ; 3λ/2 & Phase difference = ‐2π, 5π
d) Path difference = 3λ; 4λ/2 & Phase difference = 0, ‐2π
Page 2 of 9
