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Answer:

RMS ' refers to Root Mean Square and is a way to demonstrate an AC voltage or current quantity in forms that are functionally identical to DC.

Explanation:

RMS ' refers to Root Mean Square and is a way to demonstrate an AC voltage or current quantity in forms that are functionally identical to DC. For reference, 10 volts AC RMS is the voltage level which would generate the same amount of energy dissipation along with a given quality resistor as a 10 volt DC power source.

An AC waveform's crest factor is its peak (crest) ratio to its RMS value.             AC waveform's shape factor is its RMS value ratio to its average value.