MCQ Questions on Physics
21-The rate of change of angular momentum of a body about a fixed axis of rotation is directly proportional to
(A) Torque
(B) Inertia
(C) Moment of inertia
(D) Mass
22-The angular momentum of the electron in hydrogen atom can possibly be
(A) h/π
(B) h/2π
(C) h/4π
(D) 2h/π
23-The direction of propagation of electromagnetic wave is given by
(A) E x B
(B) B
(C) E
(D) E . B
24-‘’The magneto motive force around a closed path is equal to current enclosed by the path’’. The law is
(A) Tangent law
(B) Stoke’s law
(C) Biot-Savart’s law
(D) Ampere’s circuital law
25-Expression for velocity of escape (VC) from the surface of the earth is
(A) 2gR
(B) 1/2gR
(C) 1/(2gR)1/2
(D) (2gR)1/2
26-Which of the following objects has the largest momentum?
(A) An elephant standing still
(B) A horse walking at about 2 miles/hour
(C) A football quarterback running at top speed
(D) A bullet fired from a rifle
27-An orbit in which a satellite appears stationary relative to any point on earth is called
(A) Geo stationary orbit
(B) Geo polar orbit
(C) Geo inclined orbit
(D) Geo orbiter orbit
28-The period of a compound pendulum when suspended about its C.G. is
(A) Maximum but finite
(B) Cannot predicted
(C) Infinity
(D) Zero
29-The number of space groups exhibited by crystals are
(A) 200
(B) 240
(C) 220
(D) 230
30-Mass of a neutrino is
(A) Zero
(B) Same as that of a photon
(C) Same as that of a proton
(D) Same as that of an electron
ANSWERS:
21-(A), 22-(B), 23-(A), 24-(D), 25-(C), 26-(D), 27-(A), 28-(C), 29-(D), 30-(A)