why do we get a null point on a potentiometer or a slide wire bridge

Asked by  | 4th Jan, 2013, 12:53: PM

Expert Answer:

As we hold the jockey over the potentiometer wire and move over it from one end to another slowly, we would see the deflection in the galvanometer connected.
Thus when the jockey would reach a partcular point on the wire, the deflection in the galvanometer will be 0 ie, the needle of the galvanometer will be on 0.then we have to take the reading of the scale to measure the length of the wire.

Answered by  | 4th Jan, 2013, 01:03: PM

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