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Energy and Power

Energy and Power
In 0.025 W, there are

25 kW
0.00025 mW
25 mW
2,500 µW

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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
33
both resistors

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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

0.5 W
1 W
2 W
5 W

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Energy and Power
A 15 V source is connected across a 12 resistor. How much energy is used in three minutes?

56.25 Wh
5.6 Wh
938 Wh
0.938 Wh

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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

58 Ah
21 Ah
2.1 Ah
0.58 Ah

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

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

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