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internal resistance

noun, Electricity.
the resistance within a battery, or other voltage source, that causes a drop in the source voltage when there is a current. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for internal-resistance

internal resistance

(physics) the resistance of a cell, accumulator, etc, usually given as (E-V)/I, where E is the emf of the cell, and V the potential difference between terminals when it is delivering a current I
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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