A) 10 Hz
B) 5 Hz
C) 4 Hz
D) 2 Hz
Correct Answer: B
Solution :
In the case of standing wave, the length of one segment is \[\frac{\lambda }{2}\]. There are 5 segments and total length of string is 10 m. \[\therefore \] \[5\frac{\lambda }{2}=10\] \[\Rightarrow \] \[\lambda =4m\] Frequency, \[n=\frac{v}{\lambda }=\frac{20m/s}{4m}=5Hz\] NOTE: Standing wave is an example of interference. Destructive interference means node and constructive interference means antinode.You need to login to perform this action.
You will be redirected in
3 sec