To show how to calculate rms voltages (and currents) for various periodic waveforms.
Observe some examples of waveforms you may encounter that have an average value of zero.
Examine the power dissipated in a resistor supplied by an ideal squarewave.
Find the rms of a triangular waveform.
The rms value of a sine wave is very important in AC circuit analysis.
Recall how to calculate rms and how it is useful in circuits supplied by a periodic waveform.
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