In a potentiometer circuit, the emf of d...

In a potentiometer circuit, the emf of driver cell is 2V and internal resistance is `0.5 Omega `. The potentiometer wire is 1m long . It is found that a cell of emf 1V and internal resistance `0.5 Omega ` is balanced against 60 cm length of the wire. Calculate the resistance of potentiometer wire.

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