Wave Mechanics Question 725
Question: The velocity of waves in a string fixed at both ends is 2 m/s. The string forms standing waves with nodes 5.0 cm apart. The frequency of vibration of the string in Hz is
[SCRA 1998]
Options:
A) 40
B) 30
C) 20
D) 10
Show Answer
Answer:
Correct Answer: C
Solution:
Here $ \frac{\lambda }{2}=5.0,cm $
$ \Rightarrow \lambda =10 $
$ cm $ Hence $ n=\frac{v}{\lambda }=\frac{200}{10}=20 $ Hz.
BETA
