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TeachMeFinance.com - explain Root Mean Square (RMS) Root Mean Square (RMS) The term 'Root Mean Square (RMS) ' as it applies to the area of photovoltaics can be defined as 'The square root of the average square of the instantaneous values of an ac output. For a sine wave the RMS value is 0.707 times the peak value. The equivalent value of ac current, I, that will produce the same heating in a conductor with resistance, R, as a dc current of value I'. Previous 5 Terms: rooirhebok Room air conditioner Room heater burning gas, oil, and kerosene Room-and-pillar mining root Next 5 Terms: Root zone Rope Rope Cloud Rope Stage roriferous About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.