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A potentiometer wire is 500 cm long and ...

A potentiometer wire is 500 cm long and potential difference of 4 V is maintained between the ends of the wire. The e.m.f. of the cell which balances against the length of 135 cm of the wire is

A

0.08 V

B

2.08 V

C

2.88V

D

1.08 V

Text Solution

Verified by Experts

The correct Answer is:
D
`(E_(1))/(V)=(I rho l_(1))/(I rho l) " " :.E_(1)=(4xx1.35)/(5)=1.08V`
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