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Electric Power

How much elec...

Question

How much electrical energy flows through a wire in 1 second when the power is 1 kW?

A

1400 J

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B

1000 J

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C

800 J

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D

400 J

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Solution

The correct option is B
1000 J

We know that, $P o w e r = \frac{Energy}{time}$ , the SI unit of power is watt, energy is joule and time is second.

So, 1 W = 1 joule per sec and 1 kW = 1000 joule per sec.

Therefore, 1000 J electrical energy flows through the wire in 1 second when the power is 1 kW.

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