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Power is defined as
The rate of energy transfer or the amount of energy transferred per second
The power of a device depends on:
The voltage of the device
The current of the device
The power of an electrical component (or appliance) is given by the equation:
power = current x voltage
unit of power?
watt (W) / joule per second (J/s) (energy per second)
Calculate the potential difference through a 48 W electric motor with a current of 4 A.
V = P/I so 48 / 4 =12 12V