This is only true for sinusoidal waveforms. As soon as you introduce
non-sinusoidal waveforms, such as by using a diode, then different
calculations must be used.
http://en.wikipedia.org/wiki/Power_factor
On 5/27/2013 7:49 AM, David Roberson wrote:
All of the power being delivered into the resistor from the wall
socket can be determined by taking the AC voltage which is a sine wave
and multiplying it by the fundamental frequency of the AC current(also
a sine wave). This must be adjusted by multiplication by the cosine
of the phase angle between the supply voltage and fundamental current.
