Question

Potentiometer is mainly used to measure​

Answer 1

Answer:

The principle of a potentiometer is that the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length. The potentiometer is a simple device used to measure the electrical potentials (or compare the e.m.f of a cell).

Answer 2

Step-by-step explanation:

A potentiometer circuit can be used for comparing and measuring potential differences, the principle of action being that the unknown EMF is measured by balancing it against a known potential difference