Home
Class 12
PHYSICS
An observer standing on a railway crossi...

An observer standing on a railway crossing receives frequencies 2.2 kHz and 1.8 kHz when the train approaches and recedes from the observer. Find the velocity of the train (speed of sound in air is 300 m/s).

Text Solution

Verified by Experts

The correct Answer is:
30
Promotional Banner

Topper's Solved these Questions

  • NTA JEE MOCK TEST 57

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

  • NTA JEE MOCK TEST 59

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

A whistling train approaches a junction. An observer standing at juction obsrever the frequency to be 2.2 KHz and 1.8 KHz of the approaching and the receding train respectively. Find the speed of the train (speed of sound 300m//s )

A man stands on a railway crossing and when a train approaches and recedes from him, he receives frequencies of 2.4 kHz and 1.8 kHz, respectively. Determine the velocity of the train. Take, Speed of sound in air = 320 m/s

The ratio of the apparent frequencies of a car when approaching and receding a stationary observer is 11:9 What is the speed of the car, if the velocity of sound in air is 330 m/s?

An engine giving whistle is moving towards a stationary observer with 110m//s speed. What will be the ratio of the frequency of the whistle heard when the engine is approaching and receding from the observer (the speed of sound is 330 m//s ) ?

An observer standing at station observes frequency 219 Hz when a train approaches and 184 Hz when train goes away from him. If velocity of sound in air is 340m//s , then velocity of train and actual frequency of whistle will be

The frequency of the whistle of a train is observed to drop from 280 Hz to 260 Hz as the train moves away from a stationary listerner on the platform. Calculate the speed of the train, if speed of sound in air is 340 m/s.

A train is passing a stationary observer at station with constant velcity. If the frequency observed by the person during its approches and recession are 2.2 kHz and 1.8 kHz respectively. Then find the velocity of train if the velocity of sound in air in air is 300 m//s .

NTA MOCK TESTS-NTA JEE MOCK TEST 58-PHYSICS
  1. An insulating solid sphere of the radius R is charged in a non - unifo...

    Text Solution

    |

  2. Suppose the gravitational force varies inversely as the n^(th) power o...

    Text Solution

    |

  3. A rod of length l (laterally thermally insulated) of the uniform cross...

    Text Solution

    |

  4. An ideal diatomic gas undergoes a thermodynamic process as shown in th...

    Text Solution

    |

  5. A man crosses a river in a boat. If he cross the river in minimum time...

    Text Solution

    |

  6. The friction coefficient between the board and the floor shown in figu...

    Text Solution

    |

  7. A radionuclide with half - life 1620 s is produced in a reactor at a c...

    Text Solution

    |

  8. A disc of radius R and mass M is pivoted at the rim and it set for sma...

    Text Solution

    |

  9. In a photoelectric effect experiment, stopping potential changes by 30...

    Text Solution

    |

  10. The length of a metal wire is l(1) when the tension in it is T(1) and ...

    Text Solution

    |

  11. A light ray is incident on lower medium boundary at an angle 30^(@) wi...

    Text Solution

    |

  12. 1000 kHz carrier wave is amplitude modulated by the signal frequency ...

    Text Solution

    |

  13. A pendulum clock (fitted with a small heavy bob that is connected with...

    Text Solution

    |

  14. The unit of electric permittivity is (C^(2))/(Nm^(2)). Find the dimens...

    Text Solution

    |

  15. The blocks A and B shown in figure have masses MA=5kg and MB=4kg. The ...

    Text Solution

    |

  16. A boat covers 24 km upstream and 36 km downstream in 6 hours while ...

    Text Solution

    |

  17. A non - conducting rod of length L with linear charge density lambda=l...

    Text Solution

    |

  18. The instaneous velocity of point B of the given rod of length 0.5 is 3...

    Text Solution

    |

  19. In Young's double - slit experiment, the distance between slits is d =...

    Text Solution

    |

  20. An observer standing on a railway crossing receives frequencies 2.2 kH...

    Text Solution

    |