Home
Class 11
PHYSICS
A car is travelling with a velocity of 4...

A car is travelling with a velocity of `40 m//s` towards a source of sound of frequency 1000 Hz. If sound velocity is `330 m//s`, then apparent frequency heard by the observer (in Hz) is

A

1121

B

878

C

1400

D

1200

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTORS

    TARGET PUBLICATION|Exercise EXERCISE|147 Videos

  • Thermal Properties of Matter

    TARGET PUBLICATION|Exercise Exercise|259 Videos

Similar Questions

Explore conceptually related problems

A train is moving with a uniform speed of 33 m//s and an observer is approaching the train with the same speed. If the train blows a whistle of frequency 1000 Hz and the velocity of sound is 333 m//s then the apparent frequency of the sound that the observer hears is

A source of sound S is moving with a velocity 50 m//s towards a stationary observer. The observer measures the frequency of the source as 1000 Hz. What will be the apparent frequency of the source when it is moving away from the observer after crossing him? The velocity of sound in the medium is 350 m//s .

An observer starts moving with uniform acceleration ‘a’ towards a stationary sound source emitting a whistle of frequency ‘n\ As the observer approaches source, the apparent frequency heard by the observer varies with time as

A source of sound has frequency 2000 Hz. If the speed of sound in air 340m//s , find the distance covered by sound when the source completes 400 vibrations.

The observer is moving with velocity 'v_0' towards the stationary source of sound and then after crossing moves away from the source with velocity ' v_0 '. Assume that the medium through which the sound waves travel is at rest, If 'v' is the velocity of sound and 'n' is the frequency emitted by the spurce then the difference between apparent frequencies heard by the observer is

An engine driver moving towards a wall with a velocity of 60 m//s emits a note of 1400 Hz. Speed of sound in air is 340 m//s . The frequency of the note after reflection from the wall as heard by the engine driver is

A source and an observer move away from each other with a velocity of 10 m/s with respect to ground. If the observer finds the frequency of sound coming from the source as 1950 Hz , then actual frequency of the source is (velocity of sound in air = 340 m/s )

A rocket is moving at a speed of 220 m//s towards a stationary target. It emits a wave of frequency 1200 Hz. Some of the sound reaching the target gets reflected back to the rocket as an echo. Calculate (1) The frequency of sound detected by the target and (2) The frequency of echo detected by rocket (velocity of sound = 330 m//s .)

If the lengths of a closed rogan pipe is 1.5m and velocity of sound is 330m/s, then the frequency for the second note is

TARGET PUBLICATION-Sound-Exercise
  1. If sound velocity is v, velocity of observer is v0 and velocity of sou...

    Text Solution

    |

  2. Consider a source of sound S and an observer P. The frequency of sound...

    Text Solution

    |

  3. A car is travelling with a velocity of 40 m//s towards a source of sou...

    Text Solution

    |

  4. What should be the velocity of sound from a source w.r.t. an observer,...

    Text Solution

    |

  5. The frequency of a whistle of the engine of an express train moving wi...

    Text Solution

    |

  6. Two cars are moving on two perpendicular roads towards a crossing with...

    Text Solution

    |

  7. An observer starts moving with uniform acceleration ‘a’ towards a stat...

    Text Solution

    |

  8. The frequency of a note emitted by a source changes by 20% as it appro...

    Text Solution

    |

  9. A source of sound is travelling towards a stationary observer. The fre...

    Text Solution

    |

  10. A man is watching two trains, one leaving and the other coming in with...

    Text Solution

    |

  11. A police car moving at 22 m//s, chases a motorcyclist. The police man ...

    Text Solution

    |

  12. An observer moves towards a stationary source of sound with a speed 1/...

    Text Solution

    |

  13. The number of waves contained in unit length of the medium is called

    Text Solution

    |

  14. An observer standing at the sea coast observes 54 waves reaching the c...

    Text Solution

    |

  15. The propagation of sound waves is not possible in space because

    Text Solution

    |

  16. In an orchestra, the musical sounds of different instruments are disti...

    Text Solution

    |

  17. A stone is dropped into a lake from a tower 500 metre high. The sound ...

    Text Solution

    |

  18. Consider the following I. Waves created on the surfaces of a water p...

    Text Solution

    |

  19. An earthquake generates both transverse (S) and longitudinal (P) sound...

    Text Solution

    |

  20. A light pointer fixed to one prong of a tuning fork touches a vertical...

    Text Solution

    |