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In a potentiometer experiment, the balan...

In a potentiometer experiment, the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of `2 Omega`, the balancing becomes 120 cm. The internal resistance of the cell is

A

`2 Omega`

B

`4 Omega`

C

`0.5`

D

`1 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`r = (l_(1) - l_(2))/(l_(2)) R = (240 - 120)/(120) xx 2 Omega = 2 Omega`
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