Question

The speed of a wave in a string is 20 m/s and the frequency is 50 Hz. The phase difference between two points on the string 10 cm apart will be ______.

Options

• π/2

• π

• 3π/2

• 2π

Answer 1

The speed of a wave in a string is 20 m/s and the frequency is 50 Hz. The phase difference between two points on the string 10 cm apart will be π/2.

Explanation:

`Deltaphi = (2pi)/lambdaDeltax`

= `(2pi)/v xx n xx Deltax`

= `(2pi)/20 xx 50 xx 10/100`

= `pi/2`