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Energy and Power

Energy and Power
In 40 kW, there are

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

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

257 V
2.5 V
73.3 V
25.7 V

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Energy and Power
How much continuous current can be drawn from a 60 Ah battery for 14 h?

4.28 A
4.2 A
42.8 A
428 A

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Energy and Power
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

8.57%
4.28%
42.85%
85.7%

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

13.3 kWh
1.2 kWh
1.3 kWh
12 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
8.4 kWh
201.6 kWh
20.16 kWh

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