Home
Class 12
PHYSICS
If source and observer both are relative...

If source and observer both are relatively at rest and if speed of sound is increased then frequency heard by observer will

A

Increases

B

Decreases

C

Can not be predicted

D

Will not change

Text Solution

Verified by Experts

The correct Answer is:
D
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 source of sound S emitting waves of frequency 100 Hz and an observer 0 are located at some distance from each other. The source is moving with a speed of 19.4 ms^(-1) at an angle of 60^(@) with the source observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air 330 ms^(-1) ) is ......

When both source and observer approach each other with a speed a equal to the half the speed of sound, then determine the percentage change in frequency of sound as detected by the listener.

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 ms^(-1) Then, the frequency of sound that the observer hears in the echo reflected from the cliff is ....... (Take velocity of sound in air = 330 ms^(-1))

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 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

One source of sound moves towards stationary listener with a speed, (1)/(10) times speed of sound. Ratio of frequency of sound heard by listener to that emitted from source is .......

A whistle revolves in a circle with an angular speed of 20 rad//sec using a string of length 50 cm . If the frequency of sound from the whistle is 385 Hz , then what is the minimum frequency heard by an observer which is far away from the centre in the same plane? v=340m//s

A band playing music at a frequency f is moving towards a wall at a speed v_(b) . A motorist is following the band with a speed v_(m) . If v is the speed of sound, obtain an expression for the beat frequency heard by the motorist.

Write the relation between wavelength, frequency and speed of sound (AS_1)

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

    |