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In a potentiometer experiment it is foun...

In a potentiometer experiment it is found that no current passes through the galvanometer when the terminals of the cell are connected across `0.52 m` of the potentiometer wire. If the cell is shunted by a resistance of `5Omega` balance is obtained when the cell connected across` 0.4m` of the wire. Find the internal resistance of the cell.

A

`5.2Omega`

B

`4Omega`

C

`1.5Omega`

D

`1Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
`r_(1)=R_(1)((l_(1)-l_(2))/(l_(2)))=5((52-40)/(40))=1.5 Omega`
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