Question

Open organ pipe when filled with water partially then its fundamental frequency

• A. Increases
• B. Decreases
• C. Remain same
• D. Either $a$ or $b$

Answer 1

The correct option is A Increases

The fundamental frequency of open organ pipe is $\nu =\frac{v}{2l}$ where v is the velocity of sound and l is the length of organ pipe. Velocity of sound depends on the medium. If medium is liquid then the velocity of sound increases and hence frequency increase.