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 ______.

विकल्प

• 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:

${\displaystyle \Delta \varphi =\frac{2\pi }{\lambda }\Delta x}$

= ${\displaystyle \frac{2\pi }{v}\times n\times \Delta x}$

= ${\displaystyle \frac{2\pi }{20}\times 50\times \frac{10}{100}}$

= ${\displaystyle \frac{\pi }{2}}$