AC Theory
Say
Peak value
Maximum instantaneous value.
Peak-to-peak value
Maximum variation between maximum positive and negative instantaneous values.
For a sinusoidal waveform, this is twice the peak value.
Mean value
Here:
is the starting time of a cycle is the periodic time
For any symmetric waveform, mean value is
Average value
Mean value of the rectified version of a waveform.
For symmetric waveforms, half-cycle mean value is taken as the average value.
For sinusoidal waveforms, from the example:
rms value
Aka. effective value. rms value is always used to express the magnitude of a time varying quantity.
For sinusoidal waveforms: