•−•  ••−•    −•−•  •−  ••−•  • RF Cafe Morse Code >Hear It<
Job Board
About RF Cafe©
RF Cafe E-Mail

RMS: Voltage & Average Power

In mathematics, 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. It can be calculated for a series of discrete values or for a continuously varying function. The name comes from the fact that it is the square root of the mean of the squares of the values. - Wikipedia

General Equation:

RMS (effective) value of any periodic function with period T.



Average of instantaneous power.

   

Equation for a Sine Wave:
 



...for positive or negative half-cycle

A Disruptive Web Presence™ Custom Search Over 10,000 pages indexed! (none duped or pirated)	Read About RF Cafe Webmaster: Kirt Blattenberger     KB3UON	RF Cafe Software RF Cascade Workbook RF system analysis including frequency conversion & filters RF & EE Symbols Word RF Stencils for Visio
	Product & Service Directory Personally Selected Manufacturers
	RF Cafe T-Shirts & Mugs
	RF Cafe Software Calculator Workbook RF Workbench Smith Chart™ for Visio Smith Chart™ for Excel