Fundamental frequency in close/organ pipe
(f)=4ℓvf1=4ℓ1v&f2=4ℓ2v
Beat =(f1−f2)=4v(ℓ11−ℓ21)
15=4v(11−1.21)v=(0.215×4×1.2)=60×6=360 m/s
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…
JEE Main 2025 — Physics Waves & Oscillations
2025mcqmedium
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 :
Official previous-year question
Held on 3 Apr 2025 · Verified 6 Jul 2026.
Options
- A
335 m/s
- B
370 m/s
- C
340 m/s
- D
360 m/s
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