Wave Mechanics Question 1116
Question: If the velocity of sound in air is 336 m/s. The maximum length of a closed pipe that would produce a just audible sound will be
[KCET 2001]
Options:
A) 3.2 cm
B) 4.2 m
C) 4.2 cm
D) 3.2 m
Show Answer
Answer:
Correct Answer: B
Solution:
Minimum audible frequency = 20 $ Hz $ . $ \Rightarrow $ $ \frac{v}{4l}=20\Rightarrow l=\frac{336}{4\times 20}=4.2 $
$ m $
BETA
