Power is the rate of transfer of energy. The more powerful an appliance, the faster the rate at which hit transfers energy. The power of an appliance is measured in watts (W) or kilowatts (kW).
1 watt is a rate of transfer of energy of 1 joule per second (J/s).
1 kilowatt is equal to 1000 watts (i.e. 1000 joules per second or 1kJ/s).
Power is calculated using:
P = E ÷ t where, P = the power in watts
E = the energy transferred in joules
T = the time taken in seconds
