Home
Class 12
PHYSICS
A whistle of frequency 500 Hz tied to th...

A whistle of frequency 500 Hz tied to the end of a string of length 1.2 m revolves at 400 rev / min . A listener standing some distance away in the plane of rotation of whistle hears frequencies in the range (speed of sound = 340 m / s )

A

436 to 586

B

426 to 574

C

426 to 584

D

436 to 674

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RACE

    ALLEN |Exercise Basic Maths (Wave Motion & Dopplers Effect) (Superposition of waves interfarence, beats)|15 Videos

  • NEWTONS LAWS OF MOTION

    ALLEN |Exercise EXERCISE-III|28 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Example|1 Videos

Similar Questions

Explore conceptually related problems

A whistle emitting a sound of frequency 440 H z is tied to string of 1.5 m length and rotated with an angular velocity of 20 rad//sec in the horizontal plane. Then the range of frequencies heard by an observer stationed at a large distance from the whistle will (v=330 m//s)

A person going away from a factory on his scooter at a speed of 36 km/hr listens to the siren of the factory. If the actual frequency of the siren is 700 Hz and a wind is blowing along the direction of the scooter at 36 km//hr, find the observed frequency heard by the person. (Given speed of sound = 340 m//s )

A train standing in a station-yard, blows a whistle of frequency 400Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10 ms^(-1) . What are the frequency wavelength and speed of sound for an observer standing on the station's platform? Is the situation exactly identical the case when the air is still and the observer runs towards the yard at a speed of 10 ms^(-1) ? The speed of sound in still air can be taken as 340 ms^(-1)

A train approaching a hill at a speed of 40 km//hr sounds a whistle of frequency 580 Hz when it is at a distance of 1km from a hill. A wind with a speed of 40km//hr is blowing in the direction of motion of the train Find (i) the frequency of the whistle as heard by an observer on the hill, (ii) the distance from the hill at which the echo from the hill is heard by the driver and its frequency. (Velocity of sound in air = 1, 200 km//hr )

A heavy particle is tied ot the end A of a string of length 1.6m . Its other end O is fixed. It revolves as a conical pendulum with the string making 60^(@) with the vertical. Then (g=10m//s^(2))

A stone of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of 40 rev./min in a horizontal plane. What is the tension in the string ? What is the maximum speed with which the stone can be whirled around if the string can withstand a maximum tension of 200 N ?

A stone of of mass 0 .25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of 40 rev//min in a horizontal plane What is the tension in the string ? What is the maximum speed with which the stone can be whirled around If the string can withstand a maximum tension of 200 N ?

Two tuning forks A and B lying on opposite sides of observer 'O' and of natural frequency 80 Hz move with velocity 10 m//s relative to stationary observer O . Fork A moves away from the observer while the fork B moves towards him. A wind with a speed 10 m//s is blowing in the direction of motion of fork A . Find the beat frequency measured by the observer in Hz. [Take speed of sound in air as 340 m//s ].

ALLEN -RACE-Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)
  1. If in a stationary wave the amplitude corresponding to antinode is 4 c...

    Text Solution

    |

  2. What is the phase difference between the displacement wave and pressur...

    Text Solution

    |

  3. A wire of length l having tension T and radius r vibrates with fundame...

    Text Solution

    |

  4. Equation of a standing wave is generally expressed as y=2Asinomegatcos...

    Text Solution

    |

  5. Two vibrating strings of same material stretched under same tension an...

    Text Solution

    |

  6. The wave-function for a certain standing wave on a string fixed at bot...

    Text Solution

    |

  7. In a standing transerse wave on a string :

    Text Solution

    |

  8. A string vibrates in 5 segments to a frequency of 480 Hz. The frequen...

    Text Solution

    |

  9. A string vibrates in 5 segments to a frequency of 180 Hz. The frequen...

    Text Solution

    |

  10. A wave is given by the equation y = 10 sin 2 pi (100 t - 0.02 x) + ...

    Text Solution

    |

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

    Text Solution

    |

  12. An organ pipe of length L is open at one end and closed at other end. ...

    Text Solution

    |

  13. The first resonance length of a resonance tube is 40 cm and the second...

    Text Solution

    |

  14. A man sitting in a moving train hears the whistle of the engine. The f...

    Text Solution

    |

  15. A whistle of frequency 500 Hz tied to the end of a string of length 1....

    Text Solution

    |

  16. A train moves towards a stationary observer with speed 34 m//s. The tr...

    Text Solution

    |

  17. If source and observer both are relatively at rest and if speed of sou...

    Text Solution

    |

  18. A small source of sound moves on a circle as shown in figure and an ob...

    Text Solution

    |

  19. An observer moves towards a stationary source of sound, with a velocit...

    Text Solution

    |

  20. A string vibrates in 3 segments to a frequency of 320 Hz. The frequen...

    Text Solution

    |