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In a potentiometer experiment of measuri...

In a potentiometer experiment of measuring the e.m.f. of a cell, the null point is at 300 cm, when we have a resistance of `200 Omega` in series with the cell and the galvanometer. If the resistance is increased to `300 Omega`, the null point will be shifted through

A

100 cm

B

50 cm

C

25 cm

D

zero cm

Text Solution

Verified by Experts

The correct Answer is:
D
At null point, no current flows through the galvanometer. The change in resistance does not affect the position of the null point.
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