Question

The sensitivity of a potentiometer can be increased by
(A) increasing emf of cell
(B) increasing length of potentiometer wire
(C) decreasing length of potentiometer wire
(D) decreasing emf of battery of main circuit

Answer 1

Sensitivity of potentiometer can be increased by increasing the length of the potentiometer wire and by reducing the current in the circuit by using a rheostat. Both the methods help in decreasing the potential gradient, and thereby increasing the resistivity.

Answer 2

(B) increasing length