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n identical cell, each of emf $ε$ and internal resistance $r_{'}$ are joined in series to form a closed circuit. One cell (A) is joined with reversed polarity. The potential difference across each cell, except A, is

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2εn

n−1nε

n−2nε

2nn−2ε

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Correct option is A

i=(n−2)εnr All the cells except A will be discharging V=ε−ir =ε−(n−2)εnrr=ε[1−n−2n]=2εn

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n identical cell, each of emf ε and internal resistance r' are joined in series to form a closed circuit. One cell (A) is joined with reversed polarity. The potential difference across each cell, except A, is

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n identical cell, each of emf $ε$ and internal resistance $r_{'}$ are joined in series to form a closed circuit. One cell (A) is joined with reversed polarity. The potential difference across each cell, except A, is