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Distinguish between emf (e) and terminal voltage (V) of a cell having internal resistance r.

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Distinguish between emf (e) and terminal voltage (V) of a cell having internal resistance r. Draw a plot showing the variation of terminal voltage (V) vs the current (I) drawn from the cell. Using this plot, how does one determine the internal resistance of the cell ?

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Difference between emf (e) and terminal voltage (v)

(Any one) or any other relevant difference

The negative of slope gives internal resistance.

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