Question

....hope you will solve this

Answer 1

Answer:

Explanation:

There are 5 loops in 1 metre.

Length of one loop =0.5m

Length of two loops =0.5×2=1m

Now, λ=1m;v*=15

From formula, v=λv*⇒v=15×1⇒v=15m/s

Answer 2

Answer:

as there are 4 loops 4.lamda/2=l

*lamda=0.5

so, v=n.lamda

      =15*0.5

      =7.5m/s

Explanation: