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Energy and Power

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

1.3 kWh
12 kWh
13.3 kWh
1.2 kWh

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

3 W
300 kW
30 kW
30 W

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

117,000 Wh
11,700 Wh
11.7 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

5 W
2 W
1 W
0.5 W

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

480,000 µW
0.480 W
480 mW
All of these

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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?

neither resistor
both resistors
330
33

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