Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The work done to lift a 7 kg object to a height of 3 meters is:
A. 210 J
B. 21 J
C. 30 J
D. 70 J
Answer: 210 J
The power of a motor that performs 2000 J of work in 40 seconds is:
A. 50 W
B. 80 W
C. 100 W
D. 60 W
Answer: 50 W
The kinetic energy of a 15 kg object moving at 6 m/s is:
A. 540 J
B. 450 J
C. 360 J
D. 180 J
Answer: 540 J
The energy conversion in a gas-powered car is primarily from:
A. Chemical to mechanical
B. Mechanical to chemical
C. Electrical to chemical
D. Thermal to electrical
Answer: Chemical to mechanical
The efficiency of a power plant is the ratio of:
A. Useful energy output to energy input
B. Energy input to useful energy output
C. Work done to total energy input
D. Total energy output to power used
Answer: Useful energy output to energy input
The energy stored in a charged capacitor is an example of:
A. Electrical potential energy
B. Kinetic energy
C. Gravitational potential energy
D. Thermal energy
Answer: Electrical potential energy
The work done by a force of 20 N moving an object 5 meters is:
A. 100 J
B. 10 J
C. 25 J
D. 50 J
Answer: 100 J
The work done to move an object with a force of 12 N over a distance of 4 meters is:
A. 48 J
B. 16 J
C. 36 J
D. 24 J
Answer: 48 J
The power of a light bulb that uses 1200 J of energy in 60 seconds is:
A. 20 W
B. 30 W
C. 40 W
D. 60 W
Answer: 20 W