891. The law that governs the force between electric charges bears the name of:
A. Newton
B. Bernoulli
C. Coulomb
D. Ampere
892. The electron volt is a unit of:
A. Charge
B. Potential Difference
C. Energy
D. Momentum
893. 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
894. 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
895. 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
896. 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
897. During projectile motion the quantities remain unchanged are?
(A) Force and vertical velocity
B) Horizontal acceleration and Horizontal velocity
(C) Kinetic energy and acceleration
(D) Acceleration and momentum
898. At the top of the trajectory of a projectile, the direction of its velocity and acceleration?
(A) Parallel to each other
(B) Anti-parallel to each other
C) Perpendicular to each other
(D) None of the above
899. A particle covers 50 m distance when projected with an initial speed. On the same surface, how much will it cover a distance when projected with double the initial speed?
(A) 100 m
(B) 150 m
C) 200 m
(D) 250 m
900. The rate of change in momentum of a body is equal to?
(A) Velocity
B) Acceleration
C) Displacement
D) Applied Force
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