A) 3.2 cm
B) 4.2 m
C) 4.2 cm
D) 3.2 m
Correct Answer: B
Solution :
Velocity of sound in air \[\upsilon =330m/s\]As we are quite well known that the lowest frequency of audible sound is 20 Hz. Hence maximum length of a closed pipe to produce just audible sound is given by \[l=\frac{336}{4v}=\frac{336}{4\times 20}=4.2m\]You need to login to perform this action.
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