Home
Class 12
PHYSICS
When the observer moves towards the stat...

When the observer moves towards the stationary source with velocity, `v_1`, the apparent frequency of emitted note is `f_1`. When the observer moves away from the source with velocity `v_1`, the apparent frequency is `f_2`. If v is the velocity of sound in air and `f_1/f_2` = 2,then `v/v_1` = ?

A

2

B

3

C

4

D

5

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 86

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos
  • NTA NEET SET 88

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos
NTA MOCK TESTS-NTA NEET SET 87-PHYSICS
  1. Block A is hanging from a vertical spring and is at rest. Block B stri...

    Text Solution

    |

  2. If k(s) and k(p) respectively are effective spring constant in series ...

    Text Solution

    |

  3. A plane electromagnetic wave of wave intensity 6 W//m^(2) strikes a sm...

    Text Solution

    |

  4. If the kinetic energy of a free electron doubles , its de - Broglie wa...

    Text Solution

    |

  5. A frame made of metalic wire enclosing a surface area A is covered wit...

    Text Solution

    |

  6. In turbulent flow the velocity of the liquid molecules in contact with...

    Text Solution

    |

  7. A person can see objects clearly only when they lie between 50cm and ...

    Text Solution

    |

  8. A concave mirror of focal length f produces a real image n times the s...

    Text Solution

    |

  9. A circular disc of radius R and thickness (R)/(6) has moment of inerti...

    Text Solution

    |

  10. A sphere and a hollow cylinder roll without slipping down two separate...

    Text Solution

    |

  11. In a common base transistor circuit, IC is the Output current and IE ...

    Text Solution

    |

  12. In a reverse biased diode, when the applied voltage changes by 1V, the...

    Text Solution

    |

  13. Two moles of oxygen are mixed with eight moles of helium. The effectiv...

    Text Solution

    |

  14. A unit of area, often used in measuring land areas, is the hectare def...

    Text Solution

    |

  15. In Young's double slit experiment

    Text Solution

    |

  16. How does the angular width of principal maximum in the diffraction pat...

    Text Solution

    |

  17. When the observer moves towards the stationary source with velocity, v...

    Text Solution

    |

  18. A whistle producing sound waves of frequencies 9500 Hz and above is ap...

    Text Solution

    |

  19. A body moves from a position vec(r(1))=(2hati-3hatj-4hatk) m to a posi...

    Text Solution

    |

  20. In each heart beat, a heart pumps 80 ml blood at an average pressure o...

    Text Solution

    |