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In a potentiometer experiment the balanc...

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

A

`4 Omega`

B

`2 Omega`

C

`1 Omega`

D

`0.5 Omega`

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The correct Answer is:
B
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