The potentiometer wire `AB` shown in figure is `40 cm` long. Where the free end of the galvanometer should be connected on `AB` so that the galvanometer may show zero deflection?

The potentiometer wire `AB` shown in figure is `40 cm` long. Where the

1.	The potentiometer wire `AB` shown in figure is `40 cm` long. Where the free end of the galvanometer should be connected on `AB` so that the galvanometer may show zero deflection?
Answer» Let the free end of galvanometer be connected on `AB` at distance `x` from `A` `(8)/(12) = (AP)/(PB) = (x)/(40 - x)` `(2)/(3) = (x)/(40 - x)` `80 - 2x = 3 x rArr 5x = 80 rArr x = 16 cm`.

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The potentiometer wire `AB` shown in figure is `40 cm` long. Where the free end of the galvanometer should be connected on `AB` so that the galvanometer may show zero deflection?

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