Question

describe how a potentiometer is used to compare the e.m.f of two cells by connecting them separately.
plz help... ​

Answer 1

Answer:

Solution 1. A battery of stable emf E is used to set up a potential gradient V/ L along a potentiometer wire, where V = potential difference across the length L of the wire. The positive terminals of the cells, whose em. ... The negative terminals of the cells are connected to a galvanometer G through a two-way key.