Physics · 2026
JEE Main · 28 January 2026, Shift 2 · Q33
The speed of a longitudinal wave in a metallic bar is 400 m / s. If the density and Young's modulus of the bar material are increased by 0.5% and 1%,…
The speed of a longitudinal wave in a metallic bar is $\displaystyle 400 \mathrm{~m} / \mathrm{s}$. If the density and Young's modulus of the bar material are increased by $\displaystyle 0.5$% and $\displaystyle 1$%, respectively then the speed of the wave is changed approximately to $\displaystyle \_\_\_\_$ m/s.
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle 401$
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.