Wave Mechanics Question 1118
Question: A resonance air column of length 20 cm resonates with a tuning fork of frequency 250 Hz. The speed of sound in air is
[AFMC 1999; BHU 2000; CPMT 2001]
Options:
A) 300 m/s
B) 200 m/s
C) 150 m/s
D) 75 m/s
Show Answer
Answer:
Correct Answer: B
Solution:
For closed pipe $ n _{1}=\frac{v}{4l}\Rightarrow 250=\frac{v}{4\times 0.2} $
$ \Rightarrow v=200,m/s $
BETA
