JEE Main 2016PhysicsWaves and SoundMediumMCQ

JEE Main 2016 — Waves and Sound Question with Solution

JEE Main 2016 (03 Apr)

Question

A uniform string of length 20 m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is 

(Take, g=10 m s-2)

Choose an option

Show full solutionCorrect option: A
Correct answer
A22 s

Step-by-step explanation

Velocity in a string, at a distance x, is given by

v=µgxµ=gx

⇒ dx dt = gx

⇒∫020dxx=g∫0tdt

On integrating, we get, 

t=22  s

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About this question

This is a previous-year question from JEE Main 2016, 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.