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Standing waves are produced in a 10 m lo...

Standing waves are produced in a 10 m long stretched string. If the string vibrates in 5 segments and the wave velocity is 20 m/s, the frequency is :

A

2 Hz

B

4 Hz

C

5 Hz

D

10 Hz

Text Solution

Verified by Experts

The correct Answer is:
C
l = 10 m , distance between two nodes
`= (10)/(5) ` = 2m
`therefore (lambda)/(2) = 2m or lambda = 4m`
v = 20 `ms^(-1)`
`therefore n = (v)/(lambda) = (20)/(4) ` = 5 Hz.
correct choice is (C).
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