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77 Two cells with the same emf E and different internal resistances r1 and r2...

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77 Two cells with the same emf E and different internal resistances r1 and r2 r are connected in series to an external resistance R The value of R so that the potential difference across the first cell be zero is a 7 E E Jon 11 12 b 1 12 1 1 2 2 d M

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