Question

describe how a potentiometer is used to compare the emfs of two cells by connecting the cells individually​

Answer 1

Answer:

Using a potentiometer, we can determine the emf of a cell by obtaining the balancing length I. Here, the fall of potential along the length I of the potentiometer wire is equal to the emf of the cell, as no current is being drawn from the cell. Then,or,; where k is the potential gradient along the wire.