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A potentiometer circuit with potentiomet...

A potentiometer circuit with potentiometer wire 10 m long, and an ideal main battery of e.m.f 8 V, has been set up for finding the internal resistance of a given cell. When the resistance R, connected across the given cell, has values of (i) infinity, (ii) 10 omega , the balancing lengths, on the potentiometer wire are found to be 2.4 m and x respectively. If the internal resistance of the cell is 2 omega, the value of x is

A

1m

B

6m

C

2m

D

8m

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