In a meter bridge the point D is a neutral point (Fig. 2(EP).4).

Options

A. The meter bridge can have no other neutral. A point for this set of resistances
B. When the jockey contacts a point on meter wire left of D, currents flows to B from the wire.
C. When the jiockey contacts a point on the m tere wire to the right of D, current flows form B to the wire through galvanometer.
D. When R is increased the neutral point shifts to left.

Answer

A, C

Explanation

At neutral point, potential at B and neutral point are same. When jockey is placed at to the right of D, the potential drop across AD is more than potential drop across AB, which brings the potential of point D less than that of B, hence current flows from B to D.\