Home
Class 12
PHYSICS
A source of sound which emitting a sound...

A source of sound which emitting a sound of frequency 600 Hz is moving towards a wall with a velocity 30 m/s. Three observes A, B, C moving with velocity 20 m/s, A away from the wall and B towards the wall and Inside the source, Velocity of sound in air is 330 m/s.

Find the frequency of reflected sound observed by observer B

A

`600 310/360` Hz

B

`600 210/360` Hz

C

`600 350/300` Hz

D

`600 310/300` Hz

Text Solution

Verified by Experts

Reflected frequency from the wall is `f_"wall"=600{330/(330-30)}=600 330/300`
then frequency observed by observer B is
`f=f_"wall"{(330+20)/330}=600 330/300.350/330`
`=600. 350/300` Hz
Promotional Banner

Similar Questions

Explore conceptually related problems

A source of sound which emitting a sound of frequency 600 Hz is moving towards a wall with a velocity 30 m/s. Three observes A, B, C moving with velocity 20 m/s, A away from the wall and B towards the wall and Inside the source, Velocity of sound in air is 330 m/s. Find the frequency of direct sound observed by observer A

A source of sound which emitting a sound of frequency 600 Hz is moving towards a wall with a velocity 30 m/s. Three observes A, B, C moving with velocity 20 m/s, A away from the wall and B towards the wall and Inside the source, Velocity of sound in air is 330 m/s. Frequency of directed sound observer by observer C.

A source of sound of frequency 500 Hz is moving towards an observer with velocity 30 m/s . The speed of sound is 330 m/s . the frequency heard by the observer will be

A tuning fork of frequency 380 Hz is moving towards a wall with a velocity of 4(m)/(s) Then the number of beats heard by a stationary listener between direct and reflected sound will be (velocity of sound in air is 340(m)/(s) )

A source of sound moves towards an observer

A car is moving with a constant velocity 10 m//s towards the stationary wall. The car blows a horn of frequency 320 Hz . The velocity of sound in air is 330 m//s . The beats frequency received by the observer is

The driver of a car travelling with speed 30ms^-1 towards a hill sounds a horn of frequency 600 Hz. If the velocity of sound in air is 330ms^-1 , the frequency of reflected sound as heard by driver is

A source having frequency of 240 Hz is moving towards an observer with a speed of 20 m/sec. When the observer is moving towards the source with a velocity of 20 m/sec, then apparent frequency heard by the observer, if velocity is 330 m/sec will be

A source of sound moves towards an observe.

A source of sound of frequency 256Hz is moving rapidly towards wall with a velocity of 5m//sec . How many beats per second will be heard if sound travels at a speed of 330m//sec .