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A potentiometer wire of length L and res...

A potentiometer wire of length `L` and resistance `10 Omega` is connected in series with a battery of emf `2.5 V` and a resistance in its primary circuit. The null point corresponding to a cell of a emf `1 V` is obtained at a distance `L//2`. If the resistance in the primary circuit is doubled then the position of new null point will be.

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