Question

When the balance point is obtained in the potentiometer, a current is drawn from ______.

Options

• Both the cells and auxiliary battery

• Cell only

• Auxiliary battery only

• Neither cell nor auxiliary battery

Answer 1

When the balance point is obtained in the potentiometer, a current is drawn from auxiliary battery only.

Explanation:

When a null point is obtained in the potentiometer, the current depends only on the EMF of the auxiliary battery, its resistance and the resistance of the cells.