RMS Voltage of a Sinusoidal AC Waveform
· A periodic sinusoidal voltage is constant and can be defined as V t = Vmax cos ωt with a period of T Then we can calculate the root mean square rms value of a sinusoidal voltage V t as Integrating through with limits taken from 0 to 360 o or T the period gives Where Vm is the peak or maximum value of the waveform