Which of the following can cause the null point of a potentiometre to shift beyond the wire?

Question

Which of the following can cause the null point of a potentiometre to shift beyond the wire? (A) Shorter length of wire (B) Longer length of wire (C) Low emf of auxiliary battery (D) High emf of auxiliary battery

Tardigrade Admin · Accepted Answer

Null point of a potentiometer can shift beyond the wire if the potential gradient along the potentiometer wire decreases which is possible by having low emf of auxiliary battery.

Q. Which of the following can cause the null point of a potentiometre to shift beyond the wire?

Shorter length of wire

Longer length of wire

Low emf of auxiliary battery

High emf of auxiliary battery

Null point of a potentiometer can shift beyond the wire if the potential gradient along the potentiometer wire decreases which is possible by having low emf of auxiliary battery.