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In a meter bridge the point Dis a neutra...

In a meter bridge the point Dis a neutral point as shown in figure.

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 contacts a point on the meter wire to the right of D, current flows from B to the wire through galvanometer.

D

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

Text Solution

Verified by Experts

(A, C)
In balanced condition of bridge potential at point 8 and null point (D) will be equal. When jokey key is right of point D then voltage drop in AB wlll be more than voltage drop in AD. Hence, current will fl.ow from B to D.
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