A potentiometer wire is $100 ext{ cm}$ long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at $50 ext{ cm}$ and $10 ext{ cm}$ from the positive end of the wire in the two cases. The ratio of emf's is :

Question

A potentiometer wire is $100 	ext{ cm}$ long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at $50 	ext{ cm}$ and $10 	ext{ cm}$ from the positive end of the wire in the two cases. The ratio of emf's is :

Accepted Answer

3:2

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