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Energy and Power

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

22.6 mW
132 mW
226 mW
13.2 mW

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Energy and Power
In 0.025 W, there are

25 kW
2,500 µW
25 mW
0.00025 mW

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Energy and Power
At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

12.85 kWh
1.286 kWh
252 kWh
535 kWh

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Energy and Power
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

42.85%
4.28%
85.7%
8.57%

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

2 W
20 W
200 W
2,000 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

2.1 Ah
21 Ah
0.58 Ah
58 Ah

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MORE MCQ ON Energy and Power

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