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Wednesday, June 7, 2017

Voltage Source across Resistor

 
V(t) = Vm sin ωt



i(t) = Im sin ωt

And P(t) = v(t) i(t)

P(t) = Vm sin ωt Im sin ωt


Hence, average power is

It is clear that if current or voltage waveform has a frequency of 50 Hz then power waveform has a frequency of 100Hz.