Home
Class 12
PHYSICS
A traffic policeman standing on a road s...

A traffic policeman standing on a road sounds a whistle emitting the main frequency of 2.00 kHz. What could be the appparent frequency heard by a scooter-driver approaching the policeman at a speed of 36.0 km/h? Speed of sound in air = 340 m/s.

Text Solution

Verified by Experts

2.06 KHz
Promotional Banner

Topper's Solved these Questions

  • WAVE MOTION AND SOUND

    AAKASH SERIES|Exercise PROBLEMS (LEVEL - II)|81 Videos

  • WAVE MOTION AND SOUND

    AAKASH SERIES|Exercise EXERCISE (VERY SHORT ANSWER QUESTIONS)|25 Videos

  • WAVE MOTION

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

  • WAVE OPTICS

    AAKASH SERIES|Exercise PROBLEMS (LEVEL - II)|20 Videos
AAKASH SERIES-WAVE MOTION AND SOUND-PROBLEMS (LEVEL - I)
  1. An organ pipe has two successive harmonics withb frequencies 400 and 5...

    Text Solution

    |

  2. The fundamental frequency of a closed organ pipe is 220 Hz. Find t...

    Text Solution

    |

  3. The fundamental frequency of a closed organ pipe is 220 Hz. The sec...

    Text Solution

    |

  4. A source of frequency 10 kHz when vibrated over the mouth of a closed ...

    Text Solution

    |

  5. A closed pipe and an open pipe of same length produce 2 beats, when th...

    Text Solution

    |

  6. A tuning fork produces 4 beats per second with the other tuning fork o...

    Text Solution

    |

  7. Two tuning forks when sounded together produce 5 beats in 2 seconds. T...

    Text Solution

    |

  8. Two progressive waves y(1) = 4 sin 400 pi t and y(2) = 3 Sin 404 pi t ...

    Text Solution

    |

  9. Calculate the frequency of beats produced in air when two sources of s...

    Text Solution

    |

  10. Two sitar string A and B playing the note 'Ga' are slightly out of tun...

    Text Solution

    |

  11. The frequency of a tuning fork 'A' is 2% greater than that of a standa...

    Text Solution

    |

  12. A man standing at some distance from a cliff hears the echo of sound a...

    Text Solution

    |

  13. A motor car approaching a cliff with a velocity of 90 kmph sounds the ...

    Text Solution

    |

  14. A person standing between two parallel hills fires a gun. He hears the...

    Text Solution

    |

  15. A tuning fork of unknown frequency makes 5 beats per second with anoth...

    Text Solution

    |

  16. A traffic policeman standing on a road sounds a whistle emitting the m...

    Text Solution

    |

  17. A person riding a car moving at 72 km/h sounds a whistle emitting a wa...

    Text Solution

    |

  18. A person riding a car moving at 72 km/h sounds a whistle emitting a wa...

    Text Solution

    |

  19. A car moving at 108 km/h finds another car in front of it going in the...

    Text Solution

    |

  20. A tuning fork of frequency 328 Hz is moved towards a wall at a speed o...

    Text Solution

    |