The following circuit shows the use of potentionmeter to measure the internal resistance of a cell.
When the key K is open, how does the balance point change if the current from the driver cell decreases?

The following circuit shows the use of potentionmeter to measure the internal resistance of a cell.When the key K is closed, how does the balance point change if R is increased keeping current from the driver cell constant?

How will you use potentiometer to determine internal resistances of a cell?

Name the device used for measureing the internal resistance of a secondary cell.

Name the device used for measuring the internal resistance of a secondfary cell.

What is the internal resistance of a cell ? How it can be measured ?

When a balance point is obtained in a potentiometer for finding the internal resistance of a cell, the current through the potentiometer wire is due to