Question

what is the full form & formula of rms?

Answer 1

Peak values can be calculated from RMS values from the above formula, which implies VP = VRMS × √2, assuming the source is a pure sine wave. Thus the peak value of the mains voltage in the USA is about 120 × √2, or about 170 volts.

Answer 2

RMS stands for root mean square.

suppose you have 3 terms a,b,c and we have to find rms so formula will be...

$\sqrt{ \frac{ {a}^{2} + {b}^{2} + {c}^{2} }{3} }$