Why is e.m.f greater than potential difference in a potentiometer??

Asked by  | 23rd Jan, 2009, 02:59: PM

Expert Answer:

V = E -Ir where r is the internal resistance of the cell.

The emf is greater than the terminal potential difference of a cell because a potential drop  takes place due to the internal resistance of the cell.

Answered by  | 27th Jan, 2009, 03:55: PM

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