Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The power of a machine that performs 1500 J of work in 30 seconds is:
A. 50 W
B. 100 W
C. 75 W
D. 25 W
Answer: 50 W
The energy possessed by an object due to its motion is called:
A. Kinetic energy
B. Potential energy
C. Elastic energy
D. Thermal energy
Answer: Kinetic energy
If a machine performs 1000 J of work in 50 seconds, its power is:
A. 20 W
B. 50 W
C. 1000 W
D. 5000 W
Answer: 20 W
When a car brakes to a stop, its kinetic energy is transformed into:
A. Heat energy
B. Potential energy
C. Electrical energy
D. Chemical energy
Answer: Heat energy
Which of the following is the best example of kinetic energy?
A. A moving bicycle
B. A parked car
C. A compressed spring
D. A lit match
Answer: A moving bicycle
Which of the following is an example of electrical energy being converted to mechanical energy?
A. A fan spinning
B. A light bulb glowing
C. A battery charging
D. A toaster heating up
Answer: A fan spinning
Which of the following statements is correct about energy?
A. Energy cannot be transferred
B. Energy can be stored or transferred
C. Energy is always conserved when work is done
D. Energy can only be created, not destroyed
Answer: Energy can be stored or transferred
A person runs up a flight of stairs and performs 400 J of work in 4 seconds. The power output is:
A. 100 W
B. 1600 W
C. 400 W
D. 200 W
Answer: 100 W
A wind turbine converts wind energy into:
A. Electrical energy
B. Mechanical energy
C. Thermal energy
D. Chemical energy
Answer: Electrical energy