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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
1 h
2,000 h
10 h

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Energy and Power
If it takes 400 ms to use 12,000 J of energy, the power is

30 W
3 W
30 kW
300 kW

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Energy and Power
In 40 kW, there are

400 W
0.4 mW
5,000 W
40,000 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

21 Ah
2.1 Ah
58 Ah
0.58 Ah

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Energy and Power
A 68 resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is

226 mW
22.6 mW
132 mW
13.2 mW

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

6 V
1.2 V
120 V
12 V

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