Question

A progressive wave of frequency 50 Hz is travelling with velocity 350 m/s through a medium. The change in phase at a given time interval of 0.01 s is ______.

Options

• `(3pi)/2"rad"`

• `pi/4"rad"`

• πrad

• `pi/2"rad"`

Answer 1

A progressive wave of frequency 50 Hz is travelling with velocity 350 m/s through a medium. The change in phase at a given time interval of 0.01 s is πrad.

Explanation:

f = 50Hz

`therefore "T"=1/50=0.02  "s",`       t = 0.01 s

phase change `phi=(2pit)/"T"=2pixx0.01/0.02=pi"rad"`