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

1 W
5 W
2 W
0.5 W

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

120 V
1.2 V
12 V
6 V

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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?

200 h
1 h
2,000 h
10 h

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Energy and Power
If you used 400 W of power for 30 h, you have used

1.3 kWh
1.2 kWh
12 kWh
13.3 kWh

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

2,000 W
200 W
20 W
2 W

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MORE MCQ ON Energy and Power

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