Home
Class 12
PHYSICS
A railway engine whistling at a constant...

A railway engine whistling at a constant frequency moves with a constant speed. It goes past a stationary observer standing beside the railway track. The frequency `(n)` of the sound heard by the observer is plotted agains time `(t)`. Which of the following best represents the resulting curve?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF MATTER,FLUIDS

    D MUKHERJEE|Exercise Type 2|35 Videos

Similar Questions

Explore conceptually related problems

The rate of decay (R ) of nuclei in a radioactive sample is plotted against time (t). Which of the following best represents the resulting curve ?

The rate of decay (R ) of nuclei in a radioactive sample is plotted against time (t) . Which of the following best represents the resulting curve ?

A sound source, emitting sound of constant frequency, moves with a constant speed and crosses a stationary observer. The frequency (n) of sound heard by the observer is plotted against time (t). Which of the following graphs represents the correct variation :-

A train whistling at constant frequency is moving towards a station at a constant speed V. The train goes past a stationary observer on the station. The frequency n^(') of the sound as heard by the observer is plotted as a function of time t, figure. Identify the expected curve.

An engine whistling at a constant frequency n_0 and moving with a constant velocity goes past a stationary observer. As the engine crosses him, the frequency of the sound heard by him changes by a factor f. The actual difference in the frequencies of the sound heard by him before and after the engine crosses him is

If a source of frequency n moving with velocity v crosses a stationary observer, then the change in the frequency of sound heard by the observer will be (velocity of sound = V)

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)

D MUKHERJEE-SOUND WAVES-All Questions
  1. A plane progressive wave of frequency 25 Hz, amplitude 2.5 xx 10^(-5) ...

    Text Solution

    |

  2. A sound waves passes from a medium A to a medium B. The velocity of so...

    Text Solution

    |

  3. In a stationary wave system, all the particles of the medium

    Text Solution

    |

  4. A string of length L is stretched along the x-axis and is rigidly clam...

    Text Solution

    |

  5. The stationary waves set up on a string have the equation : y = ( 2 ...

    Text Solution

    |

  6. When a stretched string a length L viberates in its fundamental mode, ...

    Text Solution

    |

  7. When a stretched string of length L vibrating in a particular mode, th...

    Text Solution

    |

  8. A transverse sinusoidal wave of amplitude a, wavelength lambda and fre...

    Text Solution

    |

  9. A heavy unifrm rope hangs vertically from the ceiling, with its lower ...

    Text Solution

    |

  10. When the open organ pipe resonates in its fundamental mode then at the...

    Text Solution

    |

  11. In a mixture of gases, the average number of degrees of freedom per mo...

    Text Solution

    |

  12. The velocity of sound in dry air is V(d), and in moist air it is V(m)....

    Text Solution

    |

  13. When we hear a sound, we can identify its source from

    Text Solution

    |

  14. Sounds from two identical sources S(1) and S(2) reach a point P. When ...

    Text Solution

    |

  15. A vibrating string produces 2 beats per secod when sounded with a turn...

    Text Solution

    |

  16. A whistle giving out 450 H(Z) approaches a stationary observer at a sp...

    Text Solution

    |

  17. A car is moving with a velocity of 5 m//s towards huge wall. The drive...

    Text Solution

    |

  18. A railway engine whistling at a constant frequency moves with a consta...

    Text Solution

    |

  19. Two starts P and Q have slightly different surface temperature T(P) an...

    Text Solution

    |

  20. Assume that the sun rotates about an axis through its centre and perpe...

    Text Solution

    |