1. Tardigrade
  2. Question
  3. Physics
  4. A resonance pipe is open at both ends and 30 cm of its length is in resonance with an external frequency 1.1 kHz . If the speed of sound is 330 m/s , which harmonic is in resonance ?

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A resonance pipe is open at both ends and $ 30\,cm $ of its length is in resonance with an external frequency $ 1.1 \,kHz $ . If the speed of sound is $ 330\,m/s $ , which harmonic is in resonance ?

AMUAMU 2010Waves

Solution:

Fundamental frequency of open pipe
First harmonic $=n_{1}=\frac{V}{2l}=\frac{330}{2\times 0.3}=550\,Hz$
Second harmonic $=2 \times n_{1}=1100\,Hz$
$=1.1\,kHz$