Question:
In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across $52 \mathrm{~cm}$ of the potentiometer wire. If the cell is shunted by a resistance of $5 \Omega$, a balance is found when the cell is connected across $40 \mathrm{~cm}$ of the wire. Find the internal resistance of the cell.
Correct Option: 1
Solution:
