JEE Main 2021PhysicsWaves and SoundEasyMCQ

JEE Main 2021 — Waves and Sound Question with Solution

JEE Main 2021 (17 Mar Shift 2)

Question

A sound wave of frequency 245 Hz travels with the speed of 300 m s-1 along the positive x-axis. Each point of the wave moves to and fro through a total distance of 6 cm. What will be the mathematical expression of this travelling wave?

Choose an option

Show full solutionCorrect option: D
Correct answer
DY(x,t)=0.03sin5.1x-1.5×103t

Step-by-step explanation

ω=2πf

=1.5×103

A=62=3 cm=0.03 m

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About this question

This is a previous-year question from JEE Main 2021, 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.