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Questions  

What is minimum length of a tube, open at both ends, that resonates with tuning fork of frequency 350 Hz ? [velocity of sound in air = 350 m/s]

a
50 cm
b
100 cm
c
75 cm
d
25 cm

detailed solution

Correct option is A

Fundamental frequency n=v2l⇒350=3502L⇒L=12m=50 cm.

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A tube of certain diameter and of length 48 cm is open at both ends. Its fundamental frequency of resonance is found to be 320 Hz. The velocity of sound in air is 320 m/s. One end of the tube is now closed, considering the effect of end correction, calculate the lowest frequency of resonance for the tube (in Hz). 


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