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Two cells of equal e m f and of internal 3 resistances r and r...

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Two cells of equal e m f and of internal 3 resistances r and r r r are connected in series Now they are connected to an external resistance R it is observed that the potential difference across the first cell becomes zero The value of R will be 1 r 1 1 12 3 4 r f 2 11 12

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