911. A certain wire has resistance “R” The resistance of another wire, Identical with the first except for having twice its diameter, is:
A. 1/4 R
B. 1/2 R
C. 2 R
D. 4 R
912. A parallel-plate capacitor whose initial capacitance was “C” experiences a doubled separation between its plates. Now, the capacitance is:
A. 1/4 C
B. 1/2 C
C. 2 C
D. 4 C
913. The time required to charge a capacitor depends upon:
A. The magnitude of the charge
B. The Applied potential difference
C. Its capacitance only
D. The product of its Capacitance and the resistance in the circuit
914. A current flowing north along a power line. The direction of the magnetic field above it, Neglecting the earth’s field is:
A. North
B. East
C. South
D. West
915. Which among the following is a vector quantity?
A) Momentum
(B) Mass of earth
(C) Mass
(D) Volume
916. Motion of a rocket is based upon?
(A) Law of conservation of momentum
(B) Newton’s first law of motion
C) Newton’s law of gravitation
(D) None of the above
917. For a rocket, the change in momentum per second of the ejecting gases is equal to?
(A) Acceleration of the rocket
(B) Velocity of the rocket
C) Force (thrust) acting on the rocket
(D) Momentum of the rocket
918. An athlete runs with a speed of 12m/s. Determine the longest jump he can undertake.
(A) 12 m
B) 14.4 m
(C) 16.2 m
(D) 24 m
919. Horizontal range is equal to 4 times its maximum height only if the angle of projection is?
(A) 30 Degree
B) 45 Degree
(C) 60 Degree
(D) 90 Degree
920. Which of the given remains the same at all points on the trajectory of a projectile?
(A) Its acceleration
(B) Its velocity
(C) Its direction of motion
D) Its kinetic energy
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