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

According to Hubble,s law the red-shift (Z) of a receding galaxy and its distance r from earth are related as :...A horizontal platform with an object placed on it is executing simple harmonic motion in the vertical direction. The amp...A whistle revolves in a circle with angular speed ω = 20 rad/s using a string 50 cm. If the frequency of sound from...A uniform rope having some mass hinges vertically from a rigid support. A transverse wave pulse is produced at the lower...Y(x, t) = represents a moving pulse where x and y are in meter and t is in second. Then,...