JEE Main 2024 Physics question
A wire of resistance 20 Ω is divided into 10 equal parts. A combination of two parts are connected in parallel and so on. Now resulting pairs of parallel combination are connected in series. The equivalent resistance of final combination is Ω.
Answer: 5
Solution
Each part is 2 Ω; two in parallel give 1 Ω; five such pairs in series give 5 Ω.