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 v = 336 m/s. As we are quite well know 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 \[l=\frac{336}{4\times v}=\frac{336}{4\times 20}\] \[=4.2\,m\]You need to login to perform this action.
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