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Energy and Power

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

2,000 W
20 W
200 W
2 W

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Energy and Power
For 12 V and 40 mA, the power is

480 mW
All of these
0.480 W
480,000 µW

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Energy and Power
If you used 600 W of power for 60 h, you have used

3.6 kWh
1 kWh
10 kWh
36 kWh

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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?

10 h
2,000 h
200 h
1 h

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

768 mW
76.8 W
7.68 W
7.68 mW

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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
33
both resistors
330

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MORE MCQ ON Energy and Power

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