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A 600 cm long potentiometer wire is conn...

A `600 cm` long potentiometer wire is connected to the circuit. The resistance of potentiometer wire is `15 r` (a) At what distance from the point A should the jockey touch the wire to gap zero deflection in the galvanometer ? (b) If the jockey touches the wire at a distance of `560 cm` from A, what will be the current in the galvanometer ?

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