Amplitude - AC Waveforms

Peak To Peak

peak to peak voltage is 2x peak voltage for sine waves.

Instantaneous Value

This is the value of a wave at any particular instant.

The instantaneous value of a sine wave one quarter of the way through the cycle will be equal to the peak value.

Average Value

The average value is zero since the voltage is negative for the same amount of time that it is positive.

This is normally taken to mean the average value of only half a cycle of the wave.

If the average of the full cycle was taken it would of course be zero, as in a sine wave is symmetrical across zero, the positives and negatives cancel each other out, making an average of zero.

RMS Value

The RMS or ROOT MEAN SQUARED value is the value of the equivalent direct (non varying) voltage or current which would provide the same energy to a circuit as the sine wave measured.

That is, if an AC sine wave has a RMS value of 240 volts, it will provide the same energy to a circuit as a DC supply of 240 volts.

We'll cover this in more detail in a coming video. ... https://www.youtube.com/watch?v=_wAknzh6wZY