JEE Main 2019PhysicsExperimental PhysicsEasyMCQ

JEE Main 2019 — Experimental Physics Question with Solution

JEE Main 2019 (12 Apr Shift 2)

Question

A tunning fork of frequency 480 Hz is used in an experiment for measuring speed of sound v in air by resonance tube method. Resonance is observed to occur at two successive lengths of the air column, l1=30 cm and l2=70  cm. Then, ν is equal to:

Choose an option

Show full solutionCorrect option: A
Correct answer
A384 m s-1

Step-by-step explanation

Speed of sound, v=2f l2-l1
=2×4800.70-0.30
=384 m/s

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Experimental Physics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2019, covering the Experimental Physics 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.