Home
Class 11
PHYSICS
Two passenger trains moving with a speed...

Two passenger trains moving with a speed of `108km//hour` cross each other. One of them blows a whistle whose frequency is `750Hz`. If sound speed is `330m//s`, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be

A

900 Hz

B

625 Hz

C

750 Hz

D

800 Hz

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • WAVES AND SOUND

    ERRORLESS |Exercise Musical Sound|32 Videos

  • WAVES AND SOUND

    ERRORLESS |Exercise Critical Thinking Questions|51 Videos

  • WAVES AND SOUND

    ERRORLESS |Exercise Organ pipe|53 Videos

  • VECTORS

    ERRORLESS |Exercise Exercise|223 Videos

  • WORK , ENERGY , POWER AND COLLISION

    ERRORLESS |Exercise Self Evaluation Test|19 Videos

Similar Questions

Explore conceptually related problems

Two trains, each moving with a velocity of 30 ms^-1 , cross each other. One of the trains gives a whistle whose frequency is 600 Hz. If the speed of sound is 330 ms^-1 , the apparent frequency for passengers sitting in the other train before crossing would be

A train is moving with speed 72 km/h towards a hill blows a whistle of frequency 1240Hz. the frequency of echo heard by driver is(speed of sound=330m/s)

A passenger is sitting in a fast moving train The engine of the train below a whistle of frequency 'n' .If the apparent frequency of sound heard by the passenger is 'n' then

Two express trains moving at 100 kilometre per hour are travelling towards each other while one of them is whistling continuously. If the frequency of the note is 1000 Hz, find the apparent pitch to an observer in the other train (a) before the trains pass by each other and (b) after they have passed each other. (Velocity of sound in air = 340 m//s )

Two train travelling in opposite directions at 126 km/hr each, cross other while one of them is whistling if the frequency of the node is 2.22 kHz find the apparent frequency as head by an observer in the other train : (a) Before the trains cross each other (b) After the trains have crossed each other (V_("sound") = 335 m//sec)

Two cars are approaching each other on a straight road and moving with a velocity of 30 kmh-1 . If the sound produced in a car is of frequency 500 Hz, what will be the frequency of sound as heard by the person sitting in the other car ? When the two cars have crossed each other and are moving away from each other, what will be the frequency of sound as heard by the same person ? Speed of sound= 330 ms^-1 .

Two trains are moving towards each other at speeds of 20 m/s and 15 m/s relative to the ground. The first train sounds a whistle of frequency 600 Hz . the frequency of the whistle heard by a passenger in the second train before the train meets is (the speed of sound in air is 340 m/s )

Two trains are moving towards each other at speeds of 72kmh^-1 and 54 kmh^-1 relative to the ground. The first train sounds a whistle of frequency 600 Hz. Find the frequency of the whistle as heard by a passenger in the second train a. before the trains meet and b. after teh trains have crossed each other. The speed of sound in air is 340 ms^-1

ERRORLESS -WAVES AND SOUND-Doppler s Effect
  1. A whistle sends out 256 waves in a second. If the whistle approaches t...

    Text Solution

    |

  2. A person observes a change of 2.5 % in frequency of sound of horn of a...

    Text Solution

    |

  3. Two passenger trains moving with a speed of 108km//hour cross each oth...

    Text Solution

    |

  4. With what velocity an observer sould move relative to a stationary sou...

    Text Solution

    |

  5. A source of sound emitting a note of frequency 200 Hz moves towards an...

    Text Solution

    |

  6. Doppler's effect will not be applicable when the velocity of sound sou...

    Text Solution

    |

  7. An observer while going on scooter hears sound of two sirens of same f...

    Text Solution

    |

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

    Text Solution

    |

  9. A sound spurce is moving towards a stationary observer with 1/10 of t...

    Text Solution

    |

  10. The speed of sound in air at a given temperature is 350 m/ s. An engin...

    Text Solution

    |

  11. Suppose that the speed of sound in air at a given temperature is 400...

    Text Solution

    |

  12. A source of frequency 150 Hz is moving in the direction of a person ...

    Text Solution

    |

  13. The Doppler's effect is applicable for

    Text Solution

    |

  14. A source sound is moving with constant velocity of 20m//s emitting a n...

    Text Solution

    |

  15. A source of sound S is moving with a velocity of 50m//s towards a stat...

    Text Solution

    |

  16. A source and a listener are both moving towards each other with speed ...

    Text Solution

    |

  17. A table is revolving on its axis at 5 revolutions per second. A sound ...

    Text Solution

    |

  18. A source of sound S of frequency 500 Hz situated between a stationary ...

    Text Solution

    |

  19. A motor car blowing a horn of frequency 124vib//sec moves with a veloc...

    Text Solution

    |

  20. A source of sound of frequency n is moving towards a stationary observ...

    Text Solution

    |