JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 3 April 2025, Shift 2, Physics Q35

Question 35 of 75 in this shift, Physics question 10 of 25, Section A.

In the resonance experiment, two air columns (closed at one end) of 100 cm and 120 cm long, give 15 beats per second when each one is sounding in the respective fundamental modes. The velocity of sound in the air column is:

(1)360 m/sOfficial answer
(2)340 m/s
(3)335 m/s
(4)370 m/s

Official answer

Option 1

NTA final key.

Chapter: Waves
Topic: Resonance in Air Columns
Idea tested: Beats Between Two Unequal Pipes

Same topic in other shifts

All Resonance in Air Columns 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 42 of the 174 JEE Main shifts held from 2017 to 2026.