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Energy and Power

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

7.68 W
76.8 W
7.68 mW
768 mW

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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
226 mW
22.6 mW
132 mW

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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
A 220 resistor dissipates 3 W. The voltage is

257 V
73.3 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
5.6 Wh
56.25 Wh

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

2 W
20 W
200 W
2,000 W

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