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Energy and Power

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 certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume?

20.16 kWh
201.6 kWh
8.4 kWh
2.01 kWh

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

30 W
30 kW
300 kW
3 W

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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
How many watt-hours represent 65 W used for 18 h?

11.7 Wh
11,700 Wh
117,000 Wh
1,170 Wh

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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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