If the length of a potentiometer wire is increased by keeping constant potential difference across the wire, then

Options

A. the null point is obtained at larger distance
B. there is no change in the null point
C. the potential gradient is increased
D. the null point is obtained at shorter distance

Answer

A

Explanation

The null point is obtained at a larger distance.
[ The potential gradient `(V_(A)-V_(B))/(L)` is decreased and the sensitivity is increased.]