Abstract
Although the phrase “seat of EMF” in describing chemical cells has fallen into disuse, by distinguishing the distinct but incorrect conceptions both of Galvani and of Volta, in favor of the correct view of Faraday, “seat of EMF” it becomes possible (among other things) to understand:why internal resistance really is internal;why small AAA cells have the same 1.5-V EMF as much larger D cells;why AAA cells provide a given current for much less time than D cells; andwhy there is a difference between a slow (and fast) charge and discharge of an automobile battery.
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