Bihar Board 12th Physics Guess Question 2025: Check Inter Expected Questions

1

The example of a non-ohmic resistance is

Diode

2

Which of the following has higher magnetic susceptibility?

Ferromagnetic

3

Light goes from one medium to another, then it bends. The bending of ray is called as:-

Refraction

4

The magnetic induction at an X axial Point and magnetic moment of a bar magnet are

Parallel

5

In TV broadcasting uses frequency is

30 - 300 MHz

6

Electromagnetic induction is discovered

Faraday

7

The role of self inductance is equivalent to

Inertia

8

When the south pole of a magnet is moved away from any coil then the direction of induced current in the coil will be?

Anticlockwise

9

Magnetic flux per unit area (A) is?

Magnetic Field Density

10

Lenz’s Law is related to 

Energy

11

The device which converted mechanical energy into electrical energy, known as

Dynamo

12

Reactance of a capacitor decreases as the frequency of the alternating current

Decreases

13

Transformer is a setup, which

For increasing or decreasing the voltage of AC

14

Ni and N2 are numbers of turns in primary and secondary coils of step up transformers, then?

N2 > N1

15

Which of the following is not an electromagnetic wave?

Sound Wave

16

Electromagnetic waves are: 

Transverse

17

Due to which mirror smaller and virtual image forms than object?

Convex Mirror

18

Due to which mirror magnified and virtual image formed the object?

Concave Mirror

19

The focal length of a plane mirror is?

Infinity

20

If light source is line type of source, then at finite distance wave front is

Cylindrical

21

Polarization can be done of electric magnetic wave

By Pollaroid

22

Wave front coming from unknown shaped source from large distance is

Plane

23

Huygens secondary wave principle is used to

New geometrical position of wavelength

24

intensity of light is inverse square law, i.e. intensity & valid for?

Point Source

25

Electron

26

Due to increasing the temperature of the semiconductor its resistance will?

Decrease

27

Cathode Rays are 

Negative charged Particles

28

With Milliken's oil drop experiment, determines the electrons'?

Charge

29

To obtain the atomic model, which phenomenon is used related to a-particles?

Scattering

30

Rutherford's scattering experiment proves the existence of?

Positively Charged Nucleus