Energy and Power problems
- 1. In 40 kW, there are
Options- A. 0.4 mW
- B. 40,000 W
- C. 400 W
- D. 5,000 W Discuss
Correct Answer: 40,000 W
- 2. A half-watt is equal to how many milliwatts?
Options- A. 5,000 mW
- B. 5 mW
- C. 500 mW
- D. 50 mW Discuss
Correct Answer: 500 mW
- 3. A 6 V battery is connected to a 300 Ω load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?
Options- A. 1 h
- B. 200 h
- C. 2,000 h
- D. 10 h Discuss
Correct Answer: 2,000 h
- 4. A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume?
Options- A. 20.16 kWh
- B. 201.6 kWh
- C. 2.01 kWh
- D. 8.4 kWh Discuss
Correct Answer: 201.6 kWh
- 5. How much continuous current can be drawn from a 60 Ah battery for 14 h?
Options- A. 42.8 A
- B. 428 A
- C. 4.28 A
- D. 4.2 A Discuss
Correct Answer: 4.28 A
- 6. Energy equals power multiplied by time.
Options- A. True
- B. False Discuss
Correct Answer: True
- 7. The capacity of a battery is measured in milliamperes.
Options- A. True
- B. False Discuss
Correct Answer: False
- 8. Power rating is related to resistance value.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. A resistor normally opens when it burns out.
Options- A. True
- B. False Discuss
Correct Answer: True
- 10. Energy is equal to power multiplied by voltage.
Options- A. True
- B. False Discuss
Correct Answer: False
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