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In an experiment to determine the intern...

In an experiment to determine the internal resistance of a cell with potentiometer, the balancing length is 165 cm. When a resistance of 5 ohm is joined in parallel with the cell the balancing length is 150 cm. The internal resistance of cell is

A

`2.2 Omega`

B

`1.1 Omega`

C

`3.3 Omega`

D

`0.5 Omega`

Text Solution

Verified by Experts

The correct Answer is:
D
`r=R[l_(1)-l_(2))/l_(2)`
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