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Energy and Power

Energy and Power
A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least

150 mW
15 mW
4.8 W
480 mW

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Energy and Power
When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

shorted
overheated
open
reversed

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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%
85.7%
4.28%
8.57%

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

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

0.58 Ah
21 Ah
2.1 Ah
58 Ah

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Energy and Power
A 3.3 k resistor dissipates 0.25 W. The current is

8.7 µA
8.7 mA
8.7 A
87 mA

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MORE MCQ ON Energy and Power

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