Question

Why potentiometer is better than voltmeter?

Answer 1

1.the potentiometer is used to measure small pd as well as emf of cell while voltmeters are used to measure terminal pd of cell.

2.accuracy of potentiometer can be increased by increase in length of potentiometer wire while the voltmeters accuracy is fixed.

3.a small pd can measure accuractly with the help of potentiometer

4.internal resistance of cell can be measure by the potentiometer