question_answer

An air column in a pipe, which is closed at one end, will be in resonance with a vibrating tuning fork of frequency 264 Hz if the length of the column in cm is (velocity of sound = 330 m/s)             [JEE ONLINE 26-05-2012]

A)   125.00                       

B) 93.75   

C)  62.50                          

D)  187.50

Correct Answer: B

Solution :

[b] Given: Frequency of tuning fork,

Length of column L = ?

For closed organ pipe

orIn case of closed organ pipe only odd harmonics are possible.

Therefore value of  will be

Hence option [b] i.e. is correct.