Home
Class 12
PHYSICS
The apparent frequency of the whistle of...

The apparent frequency of the whistle of an engine changes in the ratio 6:5 as the engine passes a stationary observer. If the velocity of sound is `330(m)/(s)`, then the velocity of the engine is

A

25 m/s

B

60 m/s

C

30 m/s

D

80 m/s

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The apparent frequency of the whistle of an engine changes in the ratio 9 : 5 as the engine passes the stationary observer. If the velocity of sound is 350 ms^(-1) , then the speed of the engine is

The apparent frequency of the whistle of an engine changes in the ratio 13 : 12 as the engine passes a stationary observer. If the velocity of sound is 350 m/s. The velocity of engine is

The frequency of the whistle of an engine appears to drop to (2)/(3)rd of its actual value when it passes a stationary observer. Velocity of sound in air is 330 m/s then the speed of engine is

The Pitch of the whistle of an engine appears to drop to 5/6 th of original value when it passes a stationary observer if the speed of sound in air is 350 m/s then the speed of engine is

A locomotive engine approaches a railway station and whistes at a frequency of 400 Hz. A stationary observer on the platform observes a changes of 40 Hz. As the engine passed across him. If velocity of sound is 330 m/s. The speed of the engine is

When an engine passes near to a stationary observer then its apparent frequencies occurs in the ratio 5/3. if the velocity of sound is 340 m/s then speed of engine is

A source of frequency n is moving with a uniform velocity v towards a stationary observer. If the velocity of sound is V, then the change in frequency would be -

A train in approaching a station with a uniform velocity of 72kmph and the frequency of the whistle of that train is 480Hz . The apparent increase in the frequency of that whistle heard by a stationary observer on the platform is (Velocity of sound in air is 340m//s )

AAKASH INSTITUTE-TEST 7-Exercise
  1. On the superposition of two waves [y1 = 3 sin (50 pi t - 20x)] and [y2...

    Text Solution

    |

  2. Doppler shift in frequency of sound is independent of (Source is movin...

    Text Solution

    |

  3. The apparent frequency of the whistle of an engine changes in the rati...

    Text Solution

    |

  4. In determination of velocity of sound in air using resonance column tu...

    Text Solution

    |

  5. Two sound waves of wavelength 1 m and 1.02 m produces 16 beats in 2 s ...

    Text Solution

    |

  6. The frequency of the 5th harmonic of a pipe closed at one end is 680 H...

    Text Solution

    |

  7. The fundamental frequencies of two open pipes of different length are ...

    Text Solution

    |

  8. In a standing wave 4 nodes and 3 antinodes are formed between two fixe...

    Text Solution

    |

  9. The velocity of sound is generally lesser in gases than solids because...

    Text Solution

    |

  10. A uniform rope of length 12 m and mass 4 kg is hung vertically from a ...

    Text Solution

    |

  11. The speed of sound in oxygen gas at temperature 27°C is v0. If sound t...

    Text Solution

    |

  12. A transverse wave of amplitude 2 m, wavelength 4 m and frequency 6 Hz ...

    Text Solution

    |

  13. The angular frequency of a particle in a progressive wave in an elasti...

    Text Solution

    |

  14. Choose the correct statement about the mechanical wave.

    Text Solution

    |

  15. The time period of simple pendulum inside a stationary lift is T. If l...

    Text Solution

    |

  16. The force on a body executing SHM is 4 N when the displacement from me...

    Text Solution

    |

  17. The differential equation representing the S.H.M. of particle is [16 (...

    Text Solution

    |

  18. A spring of force constant 'k' is cut into four equal parts one part i...

    Text Solution

    |

  19. Choose the incorrect statement among the following

    Text Solution

    |

  20. If two objects A and B of same volume and same density are dropped fro...

    Text Solution

    |