The air column in a pipe which is closed at one end will be in resonance with a vibrating tuning fork at a frequency 250 Hz. If the length of the air column is :

Options

A. 33 cm
B. 62. cm
C. 45 cm
D. 12.5 cm .

Answer

A

Explanation

For resonance frequency of air column = frequency of tunning fork .
`therefore (V)/(4l) = v " " rArr " " l = (V)/(4v)`
l ` = (332)/(4 xx 250) = 0.53 m = 33 ` cm .
Hence the correct choice is (a) .