The resistance per centimeter of a meter bridge wire is r, with X Ω resistance in left gap. Balancing length from left end is at 40 ~cm with 25 Ω resistance in right gap. Now the wire is replaced by another wire of 2 r resistance per centimeter. The new balancing length for same settings will be at

Current Electricity: JEE Main 2024 Physics question

JEE Main 2024 · 31 Jan, Evening shift · Q6493

JEE Main 202431 Jan, Evening shiftPhysicsMediumCurrent Electricity150× since 2002

The resistance per centimeter of a meter bridge wire is

r

, with

X \Omega

resistance in left gap. Balancing length from left end is at

40 \mathrm{~cm}

with

25 \Omega

resistance in right gap. Now the wire is replaced by another wire of

2 r

resistance per centimeter. The new balancing length for same settings will be at

JEE Main 2024 Current Electricity Question with Solution (31 Jan Evening shift, Q6493) | JEE Arc