Home
Class 12
PHYSICS
Apparent frequency of train A is heard b...

Apparent frequency of train A is heard by observer in train B as 3/4 of the true frequency. Find the value of velocity of train B in m/sec. taking train A to be stationary. If the sound velocity is `332 m//sec` .-

A

110

B

108

C

75

D

83

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • SOUND WAVES

    MOTION|Exercise Exercise - 2|41 Videos

  • SOUND WAVES

    MOTION|Exercise Exercise - 3 (Section - A)|27 Videos

  • SOUND WAVES

    MOTION|Exercise Questions for practice|12 Videos

  • SIMPLE HARONIC MOTION

    MOTION|Exercise EXERCISE -4 (Leve-II) [ JEE 2011]|11 Videos

  • SURFACE TENSION

    MOTION|Exercise Exercise - 3 | Section - B Previous Year Problems | AIEEE|12 Videos

Similar Questions

Explore conceptually related problems

A siren placed at a railway platform is emitting sound of frequency 5 kHz. A passenger sitting in a train 'A' going out of platform records frequency 4.5kHz. During return journey in a different train ' B' he records a frequency of 6kHz ratio of the velocity of train 'B' and train 'A' is (Given velocity of sound, V=340m / sec )

Two trains A and B are approaching each other with 108 km h^(-1) and 126 km h^(-1) , respectively . If the train A sounds a whistle of frequency 500 Hz , find the frequency of the whistle as heard by a passenger in the train B . (a) before the trains cross each other and (b) after the trains cross each other . (Take velocity of sound as 330 m s^(-1) )

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 )

A train moving at 40 m/s, passes by a stationary observer, emitting a whistle of frequency 300 Hz. If the velocity of sound wave is 340 m/s, then the change in the apparent frequency of the sound, just before and after the train passes by the observer will be nearly

The engine of a train sound a whistle at frequency v, the frequency heard by a passenger is

A train crosses a tree in 10 sec. if the length of the train be 150 m.then find the speed of the train.

A train is approaching towards a stationary person with a velocity v . The train emits a light signal. The signal will reach the stationary person with a velocity

MOTION-SOUND WAVES-Exercise - 1
  1. Doppler’s effect can be observed for -

    Text Solution

    |

  2. Doppler’s displacement doesn’t depend upon -

    Text Solution

    |

  3. Apparent frequency of train A is heard by observer in train B as 3/4 o...

    Text Solution

    |

  4. A source and a listener are in unidirection at motion with velocities ...

    Text Solution

    |

  5. Which of the following property of waves is proved by Doppler’s effect...

    Text Solution

    |

  6. A source of frequency n is moving with a uniform velocity v towards a ...

    Text Solution

    |

  7. If an observer is moving with uniform velocity v to wards a stationary...

    Text Solution

    |

  8. A source of sound crosses a stationary observer which is moving with u...

    Text Solution

    |

  9. If a source of frequency n moving with velocity v crosses a stationary...

    Text Solution

    |

  10. If a source of frequency n crosses a stationary observer with uniform ...

    Text Solution

    |

  11. If an observer moving with velocity v crosses a stationary source of f...

    Text Solution

    |

  12. A source of frequency n and an observer are moving on a straight line ...

    Text Solution

    |

  13. Doppler effect in light differs with Doppler effect for sound, because...

    Text Solution

    |

  14. The velocity of light emitted by a source S observed by an observer O ...

    Text Solution

    |

  15. The width of spectral lines (spreading of spectral line) can be explai...

    Text Solution

    |

  16. A star is receding from earth with a velocity 3 xx 10^(6) m//s . If t...

    Text Solution

    |

  17. Due to the relative motion between a star and the earth, the following...

    Text Solution

    |

  18. The apparent change in the frequency n of the electromagnetic signal, ...

    Text Solution

    |

  19. The intensity ratio of two waves is 1 : 16. The ratio of their amplitu...

    Text Solution

    |

  20. A tuning fork of frequency 250 Hz is vibrating at one end of a tube as...

    Text Solution

    |