In a potentiometer, the balancing length of a cell of emf 10 volt is 120 cm. What will be the balancing length of potentiometer wire for a 8 volt cell?
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a
82 cm
b
88 cm
c
104 cm
d
96 cm
answer is D.
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Detailed Solution
For potentiometer the balancing length is proportional to emf in the secondary circuit810=x120⇒x=96 cm