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Eg, a light bulb consumes one hundred watts of electrical power for one hour. It is commonly used in the form of: Wh (watt-hours), kWh (Kilowatt-hour) which is 1,000 watt-hours or MWh (Megawatt-hour) which is 1,000,000 watt-hours.
Power is defined as the rate of producing or consuming energy. Say this ten times: âPower and energy are not the same thing! Power is energy per unit of time.â. The standard unit of electrical power is the watt, which is defined as a current of one ampere, pushed by a voltage of one volt. More simply, volts x amps = watts (there is a complication if weâre talking about alternating current, but weâll ignore it for now). In the USA, the standard wall socket delivers 120 volts.