JEE Main 2021PhysicsWaves and SoundMediumMCQ

JEE Main 2021Waves and Sound Question with Solution

JEE Main 2021 (25 Feb Shift 1)

Question

A student is performing the experiment of the resonance column. The diameter of the column tube is 6 cm. The frequency of the tuning fork is 504 Hz. Speed of the sound at the given temperature is 336 m s-1. The zero of the meter scale coincides with the top end of the resonance column tube. The reading of the water level in the column when the first resonance occurs is:

Choose an option

Show full solutionCorrect option: A
Correct answer
A14.8 cm

Step-by-step explanation

d=6 cm,  f=504, v=336 m s-1

e=0.3 d

l+e=λ4=V4f

l=16.66-0.3×6

l=14.866 cm

l=14.8 cm

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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.