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Energy and Power

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%
8.57%
42.85%
85.7%

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Energy and Power
If it takes 400 ms to use 12,000 J of energy, the power is

30 W
3 W
30 kW
300 kW

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Energy and Power
A 6 V battery is connected to a 300 load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

1 h
10 h
200 h
2,000 h

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

25.7 V
257 V
2.5 V
73.3 V

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Energy and Power
If you used 600 W of power for 60 h, you have used

3.6 kWh
10 kWh
36 kWh
1 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

0.5 W
5 W
2 W
1 W

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MORE MCQ ON Energy and Power

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