A nominal supply voltage of 230 V (a.c.) represents the __________ of the supply
A) average voltage
B) root-mean-square voltage
C) peak voltage
D) peak-to-peak voltage

Question

Quizplus · Accepted Answer

The nominal supply voltage of 230 V (a.c.) represents the root-mean-square (RMS) voltage of the supply. RMS voltage is a measure of the effective voltage or the voltage that would produce the same amount of power as the corresponding DC voltage. It is the most appropriate measure of the AC voltage for power calculations and is commonly used in electrical engineering. The peak voltage of a 230 V (a.c.) supply is approximately 325 V, while the peak-to-peak voltage is approximately 650 V. The average voltage of a sinusoidal AC voltage is zero.

A Nominal Supply Voltage of 230 V (A