Power

The rate of doing work or the rate of transfer of energy is called power. It is denoted by P

P = Wt

SI unit is Watt (J/s).

Average power = Total energy consumed / Total time taken

The commercial unit of power is kWh i.e. energy used in 1 hour at 1000 Joules/second.
1KWh = 3.6×106 J

 

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