The r.m.s. value of an a.c. supply is the steady d.c. which changes the electrical energy into thermal energy at an equal rate in a given resistance.
V = Voltage
In a radio circuit, the a.c voltage across a resistor is given by v=8sin120
V = 8sin120
Root Mean Square Alternate Voltage (Vrms)
V = 8sin120 V = 8 * 0.580611184 V = 4.644889474 Substitute the value of V in the formula,
|Vrms||= V / √2|
|= 4.644889474 / 1.414213562|