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In a meter bridge the point D is a neutr...

In a meter bridge the point D is a neutral point (Fig. EP 3.11)

A

The meter bridge can have no other neutral point for this set of resistances.

B

When the jockey contacts a point on meter wire left of D, current flows to B from the wire.

C

when the jockey contancts a point on the meter wire to the right of D, current flows fromo B to the wire through galvanometer.

D

When R is increased, the neutral point shifts to left.

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