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A potentiometer circuit has been set up ...

A potentiometer circuit has been set up for finding the internal! resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal! resistance. The potentiometer wire itself is 4 m long. When the resistance, R, connected across the given cell, has values of
infinity
`9.5Omega`
the ‘balancing lengths’, on the potentiometer wire are found to be 3 m and 2.85 m, respectively The value of internal resistance of the ceil is

A

`0.25Omega`

B

`0.95Omega`

C

`0.5Omega`

D

`0.75Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
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