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Energy and Power

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

2,000 W
20 W
2 W
200 W

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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

22.6 mW
13.2 mW
132 mW
226 mW

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Energy and Power
For 12 V and 40 mA, the power is

0.480 W
480 mW
480,000 µW
All of these

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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
2 W
5 W
1 W

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

1 kWh
3.6 kWh
36 kWh
10 kWh

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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?

2.01 kWh
201.6 kWh
20.16 kWh
8.4 kWh

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