Tue November 01, 2011 By: Dharmaja Patel

why do we use r.m.s value ? and what does it mean practically?

Expert Reply
Wed November 02, 2011
The root mean square (abbreviated RMS or rms), also known as the quadratic mean, is a statistical measure of the magnitude of a varying quantity. It is especially useful when variates
are positive and negative, e.g., sinusoids. RMS is used in various fields, including electrical engineering.
The RMS value of a set of values is the square root of the arithmetic mean or average of the squares of the original values (or the square of the function that defines the continuous waveform).
The RMS value of a function is often used in physics and electrical engineering.
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