# MCQ Questions on Physics

MCQ Questions on Physics

1-Energy gap in the Dirac electron energy spectrum is

(A) mc2

(B) -mc2

(C) 2mc2

(D) zero

2-Gauss’s Law is a special case of

(A) Coulomb’s Law

(B) Plank’s Law

(D) Ampere’s Law

3-The divergence of which quantity will be zero?

(A) B

(B) H

(C) D

(D) E

4-The change in Kinetic Energy of an atomic system due to the magnetic field is because of the change in ___ of the atomic system.

(A) Torque

(B) Angular momentum

(C) Angular velocity

(D) Angular acceleration

5-The escape velocity for the planet mercury is

(A) 34 km/sec

(B) 618 km/sec

(C) 61 km/sec

(D) 4.2 km/sec

6-The Einstein’s mass-energy relation is

(A) E = -mc2

(B) E = -mc

(C) E = mc

(D) E = mc2

7-Escape velocity from the surface of earth is

(A) 11.2 x 103 km/s

(B) 11.2 x 102 km/s

(C) 11.2 km/s

(D) 11.2 m/s

8-For a maximum range on the horizontal plane, the angle of projection is

(A) 90°

(B) 45°

(C) 30°

(D) 0°

9-The kinetic energy of colliding particles after collision is ___ the kinetic energy before collision

(A) less than or equal to

(B) equal to

(C) greater than

(D) less than

10-The minimum wavelength of X-ray produced is

(A) Inversely proportional to square root of accelerating potential

(B) Directly proportional to square root of accelerating potential

(C) Inversely proportional to accelerating potential

(D) Directly proportional to accelerating potential