Question

To-compare-the-emf-of-two-given-primary-cells-using-potentiometer observations

Answer 1

Yes we can compare two primary cells using potentiometer.....

Answer 2

Answer:

Materials Required: A Resistance wire, voltmeter, ammeter, battery, rheostat, meter scale, one way key, connecting wires etc.

Theory: If I be the current flowing through a conductor & V be the potential difference across its ends, then according to Ohm’s law

V∝I

or V = RI

Where, R is the constant of proportionality. It is known as resistance of the conductor.

V/I=R

R depends upon the nature of material, temperature & dimensions of the conductor.