A cell of emf E and internal resista...

A cell of emf E and internal resistance r is connected to a variable external resistor R . The graph which gives the terminal voltage of cell V with respect to R is

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A cell of emf E and internal resistance r is connected across a variable resistor R. Plot a graph showing variation terminal voltage V of the of the cell Versus the current I. Using the plot,show how the emf of the cell and its internal resistance can be determined.

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