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Energy and Power

Energy and Power
In 40 kW, there are

400 W
40,000 W
0.4 mW
5,000 W

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Energy and Power
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

4.28%
42.85%
85.7%
8.57%

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Energy and Power
At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

535 kWh
12.85 kWh
1.286 kWh
252 kWh

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Energy and Power
A 220 resistor dissipates 3 W. The voltage is

73.3 V
257 V
25.7 V
2.5 V

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Energy and Power
A 15 V source is connected across a 12 resistor. How much energy is used in three minutes?

938 Wh
0.938 Wh
56.25 Wh
5.6 Wh

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Energy and Power
Three hundred joules of energy are consumed in 15 s. The power is

20 W
2 W
200 W
2,000 W

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MORE MCQ ON Energy and Power

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