Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

Physics mcq For UPSC | SSC | Rail | RRB | State PSC P17

Physics - 17

81. Weight of a man is more
(A) At the center of the earth
(B) In space
(C) On the equator
(D) At poles

Correct Answer: [D] At poles.
82. The energy radiated by the Sun is because of
(A) Radioactive decay
(B) Photo-electric effect
(C) Nuclear fusion
(D) Nuclear fission

Correct Answer: [C] Nuclear fusion.
83. If a magnet is moved fast towards a coil, the induced electromotive force does not depend on
(A) The speed of the magnet.
(B) The resistance of the coils.
(C) The number of turns of the coil.
(D) Pole strength of the magnet

Correct Answer: [A] The speed of the magnet..
84. After a shower, it becomes difficult to drive a car at high speed on the wet road because
(A) Friction becomes zero.
(B) More force cannot be applied to the car.
(C) Friction decreases.
(D) Friction increases

Correct Answer: [C] Friction decreases..
85. Electrical energy is converted into mechanical energy by a
(A) Dynamo
(B) Rectifier
(C) Thermostat
(D) Motor

Correct Answer: [D] Motor.


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