Question

C)
v) Stationary waves are produced on a 10m long stretched string for at
both ends. If the string vibrates in 5 segments and the wave velocity is 20m's
the frequency of the waves is
d) 2Hz​

Answer 1

Answers: 5Hz

There are 5 loops in 10 metre.

Length of one loop =2m

Length of two loops =2×2=4m

Now, λ=4m;

v=20m/sec

From formula,

v=vλ.

⇒20=v×4

⇒v=5Hz.