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Energy and Power

Energy and Power
How many watt-hours represent 65 W used for 18 h?

11.7 Wh
1,170 Wh
11,700 Wh
117,000 Wh

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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
A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat?

neither resistor
330
both resistors
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

0.58 Ah
21 Ah
58 Ah
2.1 Ah

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

42.8 A
4.2 A
4.28 A
428 A

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Energy and Power
Three hundred joules of energy are consumed in 15 s. The power is

2 W
2,000 W
200 W
20 W

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