2.8 Signal waveforms cont.
Moral: A periodic signal’s RMS value measures how powerful the signal is
See text p. 38 for a sample RMS value calculation
Another important RMS result (see text p. 39) is that the RMS value of the general sinusoidal waveform x(t) = Asin(wt + f) is A/Ö2 » 0.707A
Ergo, it is easy to program meters (e.g., VOMs, DVMs, etc.) to display the RMS values of the AC (sinusoidal) waveforms encountered in the electric power industry