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ENERGY AND POWER

Energy and Power
A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is

21 Ah
58 Ah
0.58 Ah
2.1 Ah

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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?

0.938 Wh
5.6 Wh
56.25 Wh
938 Wh

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Energy and Power
At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

535 kWh
252 kWh
1.286 kWh
12.85 kWh

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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
150 mW
480 mW
4.8 W

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

1.3 kWh
13.3 kWh
1.2 kWh
12 kWh

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