Question

explain how potentiometer is used to compare emp of two cells with suitable circuit diagram.

Answer 1

Answer:

here is ur answer

Explanation:

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).