Sound WavesHard

Question

Two tuning forks A and B lying on opposite of observer ′O′ and of natural frequency 85 Hz move with velocity 10 m/s relative to stationary observer O. Fork A moves away from the observer while the fork B moves towards him. A wind with a speed 10 m/s is blowing in the direction of motion of fork A. Find the beat frequency measured by the observer in Hz. [Take speed of sound in air as 340 m/s]

Options

A.5
B.6
C.7
D.8

Solution

fobserver for source ′A′ = f0f0 ; fobserver for source ′B′ = f0f0
∴ Beat frequency = f1 - f2 = f0 = 5

Create a free account to view solution

View Solution Free
Topic: Sound Waves·Practice all Sound Waves questions

More Sound Waves Questions

Sounds from two identical sources S1 and S2 reach a point P. When the sounds reach directly, and in the same phase, the ...Frequency of tuning fork A is 256 Hz. It produces 4 beats/second with tuning fork B. When wax is applied at tuning fork ...In order that the resultant path on superimposing two mutually perpendicular SHMs be a circle, the condition is that...If a simple pendulum oscillates with an amplitude of 50mm and time period of 2 sec then its maximum velocity is :...In the nuclear transmutation49Be + X → 48Be + Y (X, Y) is(are)...