Home
Class 12
PHYSICS
An observer moves towards a stationary s...

An observer moves towards a stationary source of sound of frequency n . The apparent frequency heard by him is 2 n . If the velocity of sound in air is 332 m/sec, then the velocity of the observer is

A

166 m/sec

B

664 m/sec

C

332 m/sec

D

1328 m/sec

Text Solution

Verified by Experts

The correct Answer is:
C
`n^(')=n((v+v_(0))/(v))rArr2n=n((v+v_(0))/(v))`
`rArr(v+v_(0))/(v)=2`
`rArrv_(0)=v=332" m"//sec`
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 2

    CAREER POINT|Exercise PART (B)-CHEMISTRY|29 Videos

  • MOCK TEST 10

    CAREER POINT|Exercise PART (B) - CHEMISTRY|30 Videos

  • MOCK TEST 3

    CAREER POINT|Exercise CHEMISTRY|30 Videos

Similar Questions

Explore conceptually related problems

An observer moving towards a stationary source observes that the apparent frequency is three times the actual frequency of the source. If the velocity of sound is V, the velocity of the observer would be-

A source is moving towards a stationary observer, so that the apparent frequency increases by 50%. If velocity of sound is 330 m/s, then velocity of source is

If an observer is moving with uniform velocity v to wards a stationary source of frequency n, and if the velocity of sound in the medium is V, then the apparent change in the frequency of the sound, heard by the observer, is -

If an observer moves towards a stationary source of sound with a velocity of one tenth the velocity of sound, then the apparent increase in frequency will be

The source of sound generating a frequency of 3 kH z reaches an observer with a speed of 0.5 times the velocity of sound in air. The frequency heard by the observer is

A statinary observer receives a sound of frequency 2000 Hz. The variation of apparent frequency and time is shown. Find the speed of source, if velocity of sound is 300(m)/(s)

CAREER POINT-MOCK TEST 2-PART (B)-CHEMISTRY
  1. An observer moves towards a stationary source of sound of frequency n ...

    Text Solution

    |

  2. Sodium thiosulphate, Na(2)S(2)O(3).5H(2)O is used in photography to

    Text Solution

    |

  3. The cyanide ion CN and N(2) are isoelectronic, but in contrast to CN^(...

    Text Solution

    |

  4. Ferric ion forms a prussian blue coloured solution with K(4)[Fe(CN)(6)...

    Text Solution

    |

  5. Under what conditoin of temperature and pressur the formation of atom...

    Text Solution

    |

  6. The reaction of (S)-2 bromobutane with OH^(-) to produce (R )-butane-2...

    Text Solution

    |

  7. 4 mole of a mixture of Mohr's salt and Fe(2)(SO(4))(3) requires 500mL...

    Text Solution

    |

  8. Total charge required for the oxidation of two moles Mn3O4 into MnO4^...

    Text Solution

    |

  9. Calculate standard free energy change for the reaction 2Ag+2H^(+)rarrH...

    Text Solution

    |

  10. Which one of the following ionic species will impart colour to an aque...

    Text Solution

    |

  11. Select incorrect order :

    Text Solution

    |

  12. In which of the following processes energy is absorbed ?

    Text Solution

    |

  13. An element (atomic mass = 100 g//mol) having bcc structure has unit ce...

    Text Solution

    |

  14. Select the correct statement -

    Text Solution

    |

  15. Element X crystallizes in 12 co - ordination fcc lattice. On applyng h...

    Text Solution

    |

  16. Which of the following is correct option for the free expansion of an ...

    Text Solution

    |

  17. Which of the following is correct ?

    Text Solution

    |

  18. On increasing the temperature , the rate of a reaction:

    Text Solution

    |

  19. The molality of 15 % by wt solution of H2SO4 is

    Text Solution

    |

  20. Rate of reaction (r ) is plotted against temperature (T) for an enzyme...

    Text Solution

    |

  21. What volume of 75% alcohol by weight (d-0.80g//cm^(3)) must be used to...

    Text Solution

    |