JEE Main 2026 Physics question
When an external resistance of 5Ω is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5Ω resistor is replaced by a 2Ω resistor, a current of 0.5 A flows through it. The internal resistance of the cell is Ω.
Answer: 1
Solution
E=0.25(5+r)=0.5(2+r) gives r=1.