Question

The velocity of sound in air is $350m/s$. The fundamental frequency of an open organ pipe of length $50cm$ will be

• A. $700/s$
  
• B. $350/s$
  
• C. $175/s$
  
• D. $900/s$

Answer 1

The correct option is B $350/s$

Velocity of sound in air $v=350m/s$

Length of open pipe $L=50cm=0.5m$

Fundamental frequency of open pipe $\nu =\frac{v}{2L}$

$\therefore$ $\nu =\frac{350}{2\times 0.5}=350/s$