A person have a whistle emitting continuously a sound of

Last updated: 6/11/2023

A person have a whistle emitting continuously a sound of frequency 660 Hz While producing this sound he is running towards a vertical wall with a speed of 5 m s If the speed of sound in air is 335 m s then number of beats heard by him will be 20 Hz 10 Hz 8 Hz No beats will be heard