Internal Resistance
Introduction
A practical electrical power source which is a linear electric circuit may, according to Thévenin's theorem, be represented as an ideal voltage source in series with an impedance. This resistance is termed the internal resistance of the source. When the power source delivers current, the measured voltage output is lower than the no-load voltage; the difference is the voltage drop (the product of current and resistance) caused by the internal resistance. The concept of internal resistance applies to all kinds of electrical sources and is useful for analyzing many types of electrical circuits.Internal resistance. (2014, May 14). In Wikipedia, The Free Encyclopedia. Retrieved 01:32, August 29, 2014, from http://en.wikipedia.org/w/index.php?title=Internal_resistance&oldid=608607629
In-Class PowerpointInteresting LinksThis is a good site with a clear explanation of Internal Resistance
Internal Resistance This A Level revision site covers Internal Resistance thoroughly Internal Resistance Please use the email or Facebook links at the top of the page to send me any links that you discover so that I can add them to our site. YouTube VideosA great video on EMF, Internal Resistance and Terminal Voltage by Doc Physics
Worked example of internal resistance
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