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Energy and Power

Energy and Power
A 6 V battery is connected to a 300 load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

200 h
2,000 h
10 h
1 h

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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?

5.6 Wh
0.938 Wh
56.25 Wh
938 Wh

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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?

330
33
both resistors
neither resistor

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Energy and Power
A 75 load uses 2 W of power. The output voltage of the power supply is approximately

1.2 V
120 V
12 V
6 V

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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?

252 kWh
535 kWh
12.85 kWh
1.286 kWh

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

10 kWh
1 kWh
3.6 kWh
36 kWh

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