Question

define principle of potentiometer?​

Answer 1

Answer:

The principle of the potentiometeris that: For a wire having uniform area of cross section and uniform composition,the potential drop is directly proportional to the length of wire. The above principle is valid when potentiometer is used in comparing the EMF of two cells.

Answer 2

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).