What is Power Factor?Is the ratio of the actual electrical power dissipated by an AC circuit to the output of the RMS (root-mean-square) values of current and voltage. The difference between the two is caused by reactance in the circuit and represents power that does no useful work.To understand power factor, we'll first start with the definition of some basic terms:Power is measured in Watts.Volts X Amps X Power Factor = WattsWatts only equals Volts...