JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 28 June 2022, Shift 1, Physics Q50

Question 50 of 90 in this shift, Physics question 20 of 30, Section A.

The velocity of sound in a gas, in which two wavelengths 4.08m and 4.16m produce 40 beats in 12s, will be :

(1) $282.8\ \mathrm{ms^{-1}}$
(2) $175.5\ \mathrm{ms^{-1}}$
(3) $353.6\ \mathrm{ms^{-1}}$
(4) $707.2\ \mathrm{ms^{-1}}$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Waves
Topic: Beats
Idea tested: Beat Frequency Calculation

Same topic in other shifts

All Beats questions

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.