Home
Class 12
PHYSICS
A source emitting a sound of frequency f...

A source emitting a sound of frequency f is placed at a large distance from an observer. The source starts moving towards the observer with a uniform acceleration a. Find the frequency heard by the observer corresponding to the wave emitted just after the source starts. The speed of sound in the medium is v.

Text Solution

Verified by Experts

`(2vn^2)/(2vn -a)`
Promotional Banner

Topper's Solved these Questions

  • WAVE MOTION AND SOUND

    AAKASH SERIES|Exercise PROBLEMS (LEVEL - I)|59 Videos

  • WAVE MOTION

    AAKASH SERIES|Exercise PRACTICE SHEET ADVANCED (INTEGER TYPE QUESTIONS)|10 Videos

  • WAVE OPTICS

    AAKASH SERIES|Exercise PROBLEMS (LEVEL - II)|33 Videos

Similar Questions

Explore conceptually related problems

A source of sound moves towards an observer

A source of sound moves towards an observe.

A source of frequency 'f' is stationary and an obsercer starts moving towards it at t=0 with constant small acceleration. Then the variation of observed frequency 'f' registered by the observer with time is best represented as

If source and observer both are relatively at rest and if speed of sound is increased then frequency heard by observer will

A source of sound of frequency 1.8kHz moves uniformly along a straight line at a distance 250m from observer. The velocity of source is 0.8C where C is the velocity of sound. Find out the frequency of sound received by observer (in kHz) at the moment when the source gets closest to him.

a bus is moving towards and stationary observer with speed 20 m/s blows a horn of frequency 200 Hz. the frequency of sound heard by the observer is approximately ( take speed of sound 320 m/s)

An observer starts moving with unifrom acceleration a towards a stationary sound soure of frequency f_(o) . As the observer approaches the source ,the apparent frequency f heard by the observer varies with time t as

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 sound wave of frequency f propagating through air with a velocity c , is reflected from a surface which is moving away from the source with a constant speed v . Find the frequency of the reflected wave, measured by the observer at the position of the source.

A sound wave of frequency f propagating through air with a velocity C , is reflected from a surface which is moving away from the source with a constant speed V . Find the frequency of the reflected wave, measured by the observer at the position of the source.

AAKASH SERIES-WAVE MOTION AND SOUND-PROBLEMS (LEVEL - II)
  1. A source of sound emitting a 1200 Hz note travels along a straight lin...

    Text Solution

    |

  2. A source of sound emitting a 1200 Hz note travels along a straight lin...

    Text Solution

    |

  3. A source emitting a sound of frequency f is placed at a large distance...

    Text Solution

    |

  4. A whistle of frequency f0 = 1300 Hz is dropped from a height H = 505 m...

    Text Solution

    |

  5. A detector is released from rest over a source of sound of frequency f...

    Text Solution

    |

  6. A source S of acoustic wave of the frequency v0=1700Hz and a receiver ...

    Text Solution

    |

  7. A sound source moves with a speed of 80 m//s relative to still air tow...

    Text Solution

    |

  8. A sound source moves with a speed of 80 m//s relative to still air tow...

    Text Solution

    |

  9. A railroad train is travelling at 30 m//s in still air. The frequency ...

    Text Solution

    |

  10. A railroad train is travelling at 30 m//s in still air. The frequency ...

    Text Solution

    |

  11. A railroad train is travelling at 30 m//s in still air. The frequency ...

    Text Solution

    |

  12. A railroad train is travelling at 30 m//s in still air. The frequency ...

    Text Solution

    |

  13. Two identical tuning forks vibrating at the same frequency 256 Hz are ...

    Text Solution

    |

  14. Two sound sources are moving in opposite directions with velocities v...

    Text Solution

    |

  15. A 300 Hz source, an observer and wind are moving as shown in the figur...

    Text Solution

    |

  16. A person standing on a road sends a sound signal to the driver of a ca...

    Text Solution

    |

  17. A stationary sound sound 's' of frequency 334 Hz and a stationary ovs...

    Text Solution

    |

  18. Spherical waves are emitted from a 1.0 W source in an isotropic non-ab...

    Text Solution

    |

  19. The intensity of sound from a point source is 1.0 xx 10^-8 Wm^-2, at a...

    Text Solution

    |

  20. Most people interpret a 9.0 dB increase in sound intensity level as a ...

    Text Solution

    |