A potentiometer is used to determine the internal resistance of a cell

PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity

Problem

2.0\,\text{V}

potentiometer is used to determine the internal resistance of a

1.5\,\text{V}

cell. The balance point of the cell in the open circuit is

75\,\text{cm}

. When a resistor of

10\,\Omega

is connected across the cell, the balance point shifts to

60\,\text{cm}

. Find the internal resistance of the cell.