Power Factor

1) Mathematically, the cosine of the angle of phase difference between current and voltage applied. 2) The ratio of resistance to impedance. 3) The ratio of the actual power of an alternating current to apparent power; the number of watts indicated by a wattmeter, divided by the apparent watts as measured by a voltmeter and ammeter. 4) The multiplier used with the apparent watts to determine how much of the supplied power is available for use. 5) That quantity by which the apparent watts must be multiplied in order to give the true power.