Wave Mechanics Question 1120

Question: If the length of a closed organ pipe is 1.5 m and velocity of sound is 330 m/s, then the frequency for the second note is

[CBSE PMT 2002]

Options:

A) 220 Hz

B) 165 Hz

C) 110 Hz

D) 55 Hz

Show Answer

Answer:

Correct Answer: B

Solution:

For closed pipe second note = $ \frac{3v}{4l}=\frac{3\times 330}{4\times 1.5}=165 $

$ Hz $ .