State the principle of potentiometer. With the help of circuit diagram, describe a method to find the internal resistance of a primary cell.

With the help of a circuit diagram describe the method to find the internal resistance of a cell using potentiometer.

What is the principle of a potentiometer? With the help pf circuit diagram, explain the use of potentiometer to measure internal resistance of a given primary cell.

State the working principle of potentiometer explain with the help of circuit diagram how the potentiometer is used to determine the internal resistance of the given primary cell.