Physics MCQS

951. The area under the curve of force-displacement graph represents?
A. Work
B. Power
C. Displacement
D. Force

952. The dimensional units of the ratio of work and power are?
A. L
B. KWh
C. T
D. J

953. Work has dimensions like?
A. Momentum
B. Velocity
C. Power
D. Torque

954. Dimensions of work are?
A. [MLT]
B. [ML2T2]
C. [ML2T-2]
D. None of the above

955. In the absence of an external force, the change in momentum is?
A. Zero
B. Constant
C. Decrease
D. Increase

956. The dimensional unit of impulse is?
A. [MLT]
B. [MLT-1]
C. [ML-1T-1]
D. None of the above

957. Water flows out from a pipe at 3 kg/sec and its velocity changes from 5 m/s to zero on striking the wall. The force due to water flow?
A. 3 N
B. 5 N
C.10 N
D. 15 N

958. Impulse is a?
A. Vector quantity
B. Scalar quantity
C. Fixed quantity
D. None of the above

959. A vector is a tensor of rank:
A. 1
B. 2
C. 3
D. 4

960. If { A,B } = 0, then two operators A and B are said to be:
A. Anticommute
B. Do not commute
C. Commute
D. None of these