are joined in series to form a closed circuit. One cell (A) is joined with reversed polarity. The potential difference across each cell
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n identical cells, each of emf ℰ 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 are joined in series to form a closed circuit. One cell (A) is joined with reversed polarity. The [...]