Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The energy conversion in a bicycle 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 move a 6 kg object a distance of 4 meters is:
A. 240 J
B. 24 J
C. 60 J
D. 100 J
Answer: 240 J
The energy conversion in a battery is primarily from:
A. Chemical to electrical
B. Electrical to chemical
C. Mechanical to chemical
D. Thermal to electrical
Answer: Chemical to electrical
The formula for calculating work done is:
A. W = F × d
B. W = mgh
C. W = 1/2 mv^2
D. W = P × t
Answer: W = F × d
The power of a device that uses 600 J of energy in 30 seconds is:
A. 20 W
B. 30 W
C. 60 W
D. 10 W
Answer: 20 W
The work done to move an object with a force of 8 N over a distance of 3 meters is:
A. 24 J
B. 11 J
C. 30 J
D. 16 J
Answer: 24 J
The kinetic energy of a 10 kg object moving at 2 m/s is:
A. 20 J
B. 40 J
C. 10 J
D. 5 J
Answer: 20 J
The efficiency of an engine is defined as:
A. Useful work output / Total work input
B. Total work input / Useful work output
C. Energy stored / Energy used
D. Power output / Power input
Answer: Useful work output / Total work input
The energy conversion in a steam turbine involves:
A. Thermal to mechanical
B. Mechanical to thermal
C. Electrical to thermal
D. Chemical to mechanical
Answer: Thermal to mechanical