The SI unit of electric power is Watt which is denoted by the letter W.
The power of 1 watt is a rate of working of 1 joule per second. That is,
Also, P is related to Q (electric charge) as:
where, Q is the charge (in Coulombs)
Relation between kilowatt-hour and joule: 1 kilowatt-hour = 1000 watts for 1 hour
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