Physics · 2024
JEE Main · 31 January 2024, Shift 2 · Q49
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…
The resistance per centimeter of a meter bridge wire is $\displaystyle r$, with $\displaystyle X \Omega$ resistance in left gap. Balancing length from left end is at $\displaystyle 40$ cm with $\displaystyle 25 \Omega$ resistance in right gap. Now the wire is replaced by another wire of $\displaystyle 2 r$ resistance per centimeter. The new balancing length for same settings will be at
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 40$ cm
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JEE Main 2024 Physics question, with the answer from NTA’s final answer key. Where our answers come from.