what does the term rms voltage represent
In a direct current (DC) circuit, voltage or current is simple to define, but in an alternating current (AC) circuit, the definition is more complicated, and can be done in several ways. Root-mean-square (rms) refersto the most common mathematical method of defining the effective voltage or current of an AC wave. To determine rms value, three mathematical operations are carried out onthe function representing the AC waveform: (1) The square of the waveform function (usually a sine wave) is determined.
ROOT MEAN SQUARE (RMS) VALUE. The value of an AC voltage is continually. changing from zero up to the positive peak, through zero to the negative peak and back to. zero again. Figure-1: Difference between peak and RMS voltage. Clearly, for most of the time it is less than the. peak voltage, so this is not a good measure of its. real effect. Instead we use the root mean square. voltage (VRMS) which is. 1 2â0.7 of the peak.