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Energy and Power

Energy and Power
When the current through a 12 k resistor is 8 mA, the power is

76.8 W
7.68 mW
768 mW
7.68 W

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

25.7 V
73.3 V
257 V
2.5 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
42.8 A
428 A
4.2 A

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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
both resistors
neither resistor
33

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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
0.58 Ah
58 Ah

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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?

200 h
1 h
2,000 h
10 h

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