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Energy and Power

Energy and Power
A 3.3 k resistor dissipates 0.25 W. The current is

87 mA
8.7 µA
8.7 A
8.7 mA

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

2.1 Ah
21 Ah
0.58 Ah
58 Ah

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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
0.5 W
2 W
1 W

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Energy and Power
In 40 kW, there are

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

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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?

1 h
10 h
200 h
2,000 h

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