Home
Class 12
PHYSICS
A train moves towards a stationary obser...

A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is `f_(1)`. If the speed of train is reduced to 17 m/s, the frequency registered is `f_(2)`. If speed fo sound is 340 m/s, then the ratio `f_(1)//f_(2)` is :

A

`(18)/(19)`

B

`(1)/(2)`

C

`2`

D

`(19)/(18)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • WAVES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT ( SECTION-B ( Objective type Questions ))|45 Videos

  • WAVES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT ( SECTION-C ( Previous year Questions ))|53 Videos

  • WAVES

    AAKASH INSTITUTE ENGLISH|Exercise EXERCISE|20 Videos

  • WAVE OPTICS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-J (Aakash Challengers question))|1 Videos

  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION - D)|13 Videos

Similar Questions

Explore conceptually related problems

A train moves towards a stationary observer with speed 34 m//s . The train sounds a whistle and its frequency registered by the observer is f_(1) . If the train's speed is reduced to 17 m//s , the frequency registered is f_(2) . If the speed of sound of 340 m//s , then the ratio f_(1)//f_(2) is

A train moves towards a stationary observer with speed 34 m//s . The train sounds a whistle and its frequency registered by the observer is f_(1) . If the train's speed is reduced to 17 m//s , the frequency registered is f_(2) . If the speed of sound of 340 m//s , then the ratio f_(1)//f_(2) is

a bus is moving towards and stationary observer with speed 20 m/s blows a horn of frequency 200 Hz. the frequency of sound heard by the observer is approximately ( take speed of sound 320 m/s)

A train is moving towards a stationary observer. Which of the following curve best represents the frequency recived by observer f as a function of time?

A sound source is moving towards a stationary observer with 1/10 of the speed of sound. The ratio of apparent to real frequency is

A whistle giving out 450 H_(Z) approaches a stationary observer at a speed of 33 m//s . The frequency heard the observer (in H_(Z) ) is (speed of sound = 330 m//s )

A whistle giving out 450 H_(Z) approaches a stationary observer at a speed of 33 m//s . The frequency heard the observer (in H_(Z) ) is (speed of sound = 330 m//s )

A source of sound of frequency 500 Hz is moving towards an observer with velocity 30 m/s . The speed of sound is 330 m/s . the frequency heard by the observer will be

A source is moving towards an observer with a speed of 20 m / s and having frequency of 240 Hz . The observer is now moving towards the source with a speed of 20 m / s . Apparent frequency heard by observer, if velocity of sound is 340 m / s , is

When a source of frequency f_(0) moves away from a stationary observer with a certain velocity, an apparent frequency f' is observed. When it moves with the same speed towards the observer, the observed frequecy is 1.2 f' . If the velocity of sound is v, then the acutual frequency f_(0) is

AAKASH INSTITUTE ENGLISH-WAVES-ASSIGNMENT ( SECTION-A ( Objective type Questions ))
  1. An aluminum rod having a length 100 cm is clamped at its middle point ...

    Text Solution

    |

  2. The string of a violin has a fundamental frequency of 440 Hz. If the v...

    Text Solution

    |

  3. A wire of length one metre under a certain initial tension emits a so...

    Text Solution

    |

  4. In case of closed organ pipe, which harmonin the p^(th) overtone will ...

    Text Solution

    |

  5. The pitch of an organ pipe is highest when the pipe is filled with

    Text Solution

    |

  6. A cylindrical tube, open at the both ends, has a fundamental frequency...

    Text Solution

    |

  7. For a certain organ pipe three successive resonance frequencies are ob...

    Text Solution

    |

  8. A closed pipe of length 10 cm has its fundamental frequency half tha...

    Text Solution

    |

  9. The vibrations of four air columns under identical conditions are repr...

    Text Solution

    |

  10. In resonance tube tube successive positions of resonance are obtaine...

    Text Solution

    |

  11. During superposition of two waves of nearly equal frequencies , beat...

    Text Solution

    |

  12. A tuning fork of unknown frequency produces 4 beats per second when s...

    Text Solution

    |

  13. Ten tuning forks are arranged in increasing order of frequency is such...

    Text Solution

    |

  14. The displacement at a point due to two waves are y1=4 sin (500pit) a...

    Text Solution

    |

  15. A tuning fork vibrating with a sonometer having 20 cm wire produces 5 ...

    Text Solution

    |

  16. A column of air at 51^(@) C and a tuning fork produce 4 beats per seco...

    Text Solution

    |

  17. A man standing on a platform observes that the frequency of the sound ...

    Text Solution

    |

  18. A sound is moving towards a stationary listener with 1/10^(th) of the ...

    Text Solution

    |

  19. A train moves towards a stationary observer with speed 34 m/s. The tra...

    Text Solution

    |

  20. An observer is approaching with a speed v , towards a stationary sou...

    Text Solution

    |