JEE Main 2026 — Waves and Sound Question with Solution
JEE Main 2026 (28 January Shift 2)
Question
The speed of a longitudinal wave in a metallic bar is . If the density and Young's modulus of the bar material are increased by and , respectively then the speed of the wave is changed approximately to .
Choose an option
Show full solutionCorrect option: B
Correct answer
B401
Step-by-step explanation
The speed of a longitudinal wave in a solid is given by where is Young's modulus and is density.
Initial condition: m/s
After changes: (0.5% increase) and (1% increase)
New speed:
m/s
Initial condition: m/s
After changes: (0.5% increase) and (1% increase)
New speed:
m/s
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This is a previous-year question from JEE Main 2026, covering the Waves and Sound chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.