GCSE Physics

Electrical Power Summary

GCSE Physics

Power is the amount of energy transferred per second.

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The units for power are either joules per second (J/s) or the special unit watt (W).

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The power output of electrical things can be found using:
power = current × voltage
P = I × V

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A good way of remembering the very important formula is VIP!

GCSE Physics

For high power devices, we often use the prefixes k or M:
1 kW = 1,000 W and 1 MW = 1,000,000 W.

GCSE Physics


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