A potentiometer wire is 100 cm long and a constant potential diff… - Vidyadip

MCQ

A potentiometer wire is $100\ cm$ 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 $50\ cm$ and $10\ cm$ from the positive end of the wire in the two cases. The ratio of emf's is:

A
$5 : 1.$
B
$5 : 4.$
C
$3 : 4.$
✓
$3 : 2.$

✓

Answer

Correct option: D.

$3 : 2.$

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