Question

The velocity of sound in air is 330 m$s^{-1}$. The fundamental frequency of an organ pipe open at both ends and length 0.3 m will be

• A. 200 Hz
• B. 275 Hz
• C. 300 Hz
• D. 550 Hz

Answer 1

The correct option is D 550 Hz

Given: Velocity of sound in air $v=330m/s$

Length of the organ pipe $L=0.3m$

Fundamental frequency in an open organ pipe ${\nu }_1=\frac{v}{2L}$

${\nu }_1=\frac{330}{2\times 0.3}=550Hz$