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Energy and Power

Energy and Power
A 75 load uses 2 W of power. The output voltage of the power supply is approximately

1.2 V
120 V
6 V
12 V

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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?

1.286 kWh
535 kWh
252 kWh
12.85 kWh

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Energy and Power
The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be

5 W
0.5 W
2 W
1 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

85.7%
4.28%
8.57%
42.85%

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Energy and Power
A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least

15 mW
480 mW
4.8 W
150 mW

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Energy and Power
In 0.025 W, there are

25 kW
25 mW
2,500 µW
0.00025 mW

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MORE MCQ ON Energy and Power

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