In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52 cm of the potentiometer wire. If the cell is shunted by a resistance 5Ω, the balance point is found at 40 cm of the wire from the same end. The internal resistance of the cell is

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

1 Ω

1.5 Ω

4 Ω

5.2 Ω

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

r=l1−l25l2=(52−40)540=1⋅5Ω

Watch 3-min video & get full concept clarity