Question

Explain the principle of potentiometer.
for exam class 12th​

Answer 1

Answer:

The potential drop across any section of wire of uniform cross-section and composition is proportional to length of that section if a constant current flows through it. where x = Ep/L E p / L = potential gradient i.e. fall of potential per unit length of potentiometer.

Answer 2

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).