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In a potentiometer circuit a cell of EMF...

In a potentiometer circuit a cell of EMF 1.5V gives balance point at 36 cm length of wire. If another cell of EMF 2.5V replaces the first cell., then at what length of the wire, the balance point occurs?

A

21.6 cm

B

64 cm

C

62 cm

D

60 cm

Text Solution

Verified by Experts

The correct Answer is:
D
l = Balancing length
`E_(1)/l_(1) = E_(2)/l_(2) rArr 1.5/36 = 2.6/l_(2)`
`rArr l_(2) = 36(2.5/1.5) = 36 xx 5/3 = 60 cm`
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