Two cells, having the same e.m.f., are connected in series through an external resistance R. Cells...

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Two cells, having the same e.m.f., are connected in series through an external resistance R. Cells have internal resistances r, and r, (r,>r,) respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is (a) + 2 1-12 2 (c) r + r (d) r r (b) Two cells, having the same e.m.f., are connected in series through an external resistance R. Cells have internal resistances r, and r, (r,>r,) respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is (a) + 2 1-12 2 (c) r + r (d) r r (b)

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