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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

22.6 mW
13.2 mW
226 mW
132 mW

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Energy and Power
In 40 kW, there are

40,000 W
0.4 mW
5,000 W
400 W

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Energy and Power
A 220 resistor dissipates 3 W. The voltage is

73.3 V
257 V
25.7 V
2.5 V

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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
8.4 kWh
20.16 kWh

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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
neither resistor
both resistors

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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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