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Energy and Power

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

10 kWh
3.6 kWh
1 kWh
36 kWh

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Energy and Power
When the current through a 12 k resistor is 8 mA, the power is

7.68 mW
76.8 W
768 mW
7.68 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%
85.7%
8.57%
42.85%

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Energy and Power
A 68 resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is

13.2 mW
22.6 mW
226 mW
132 mW

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Energy and Power
A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat?

330
both resistors
33
neither resistor

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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

2 W
1 W
5 W
0.5 W

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MORE MCQ ON Energy and Power

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