Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The kinetic energy of an object is directly proportional to:
A. Its height
B. Its velocity squared
C. Its volume
D. Its temperature
Answer: Its velocity squared
The potential energy of an object is dependent on:
A. Its speed
B. Its height
C. Its temperature
D. Its volume
Answer: Its height
A device that converts mechanical energy into electrical energy is called:
A. Motor
B. Generator
C. Battery
D. Condenser
Answer: Generator
Work is done when:
A. Force is applied
B. Force moves an object
C. An object is at rest
D. Energy is conserved
Answer: Force moves an object
The power of a device that uses 540 J of energy in 30 seconds is:
A. 18 W
B. 24 W
C. 20 W
D. 30 W
Answer: 18 W
The energy required to lift a 9 kg object to a height of 4 meters is:
A. 360 J
B. 72 J
C. 90 J
D. 80 J
Answer: 360 J
The power of a machine that performs 3000 J of work in 50 seconds is:
A. 60 W
B. 100 W
C. 80 W
D. 40 W
Answer: 60 W
The energy conversion in a car engine involves:
A. Chemical to mechanical
B. Mechanical to chemical
C. Electrical to mechanical
D. Thermal to mechanical
Answer: Chemical to mechanical
The work done to lift a 6 kg object to a height of 8 meters is:
A. 480 J
B. 60 J
C. 300 J
D. 40 J
Answer: 480 J