Home
Class 12
PHYSICS
A point source of power 50pi watts is pr...

A point source of power `50pi` watts is producing sound waves of frequency `1875Hz`. The velocity of sound is `330m//s`, atmospheric pressure is `1.0xx10^(5)Nm^(-2)`, density of air is `(400)/(99pi)kgm^-3`. Then the displacement amplitude at `r=sqrt(330)`m from the point source is

A

`0.5 mum`

B

`0.2 mum`

C

`1 mum`

D

`2 mum`

Text Solution

Verified by Experts

`P_0=BKS_0 , k=(2pi)/lambda , lambda=v/f ,v=sqrt(B/rho)`
Using above, we get
`S_0=P_0/(2rhovpif)=5/(2xx1xx330xx3.14xx1875)`
`~=1mu` meter.
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR PHYSICS

    RESONANCE|Exercise Advanced level solutions|16 Videos

  • SEMICONDUCTORS

    RESONANCE|Exercise Exercise 3|88 Videos

Similar Questions

Explore conceptually related problems

A point source of power 50pi watts is producint sound waves of frequency 1875Hz . The velocity of sound is 330m//s , atmospheric pressure is 1.0xx10^(5)Nm^(-2) density of air is 1.0kgm^(-3) . Then pressure amplitude at r=sqrt(330)m from the point source is (using pi=22//7 :

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

An observer is moving away from source of sound of frequency 100 Hz. His speed is 33 m/s. If speed of sound is 330 m/s, then the observed frequency is

Distance travelled by the sound produced by a tuning fork of frequency 50 Hz completing 200 vibrations is, (the velocity of sound in air is 330 m/s)

A point A is located at a distance r = 1.5 m from a point source of sound of frequency 600 H_(Z) . The power of the source is 0.8 W . Speed of sound in air is 340 m//s and density of air is 1.29 kg//m^(3) . Find at the point A , (a) the pressure oscillation amplitude (Deltap)_(m) (b) the displacement oscillation amplitude A .

The intensity of a plane progressive wave of frequency 1000 Hz is 10^(-10) Wm^(-2) . Given that the speed of sound is 330 m//s and density of air is 1.293 kg//m^(3) . Then the maximum change in pressure in N//m^(2) is

RESONANCE-REVISION DPP-All Questions
  1. Sinusoidal waves 5.00 cm in amplitude are to be transmitted along a st...

    Text Solution

    |

  2. Two radio station that are 250 m apart emit radio waveslength 100m. Po...

    Text Solution

    |

  3. A point source of power 50pi watts is producing sound waves of frequen...

    Text Solution

    |

  4. An observer approaches towards a stationary source of sound at constan...

    Text Solution

    |

  5. Two sound waves are superimposed. The resulting pressure variation at ...

    Text Solution

    |

  6. A transverse periodic wave on a string with a linear mass density of 0...

    Text Solution

    |

  7. A pulse on a string is shown in the figure.P is particle of the string...

    Text Solution

    |

  8. A wire of density 9xx10^3 kg//m^3 is stretched between two clamps 1 m ...

    Text Solution

    |

  9. For a certain transverse standing wave on a long string , an antinode ...

    Text Solution

    |

  10. The air column in a pipe closed at one end is made to vibrate in its s...

    Text Solution

    |

  11. Velocities of three persons A,B,C and sound source S are shown in diag...

    Text Solution

    |

  12. In the figure shown strings AB and BC have masses m and 2m respectivel...

    Text Solution

    |

  13. A uniform string of length l, fixed at both ends is vibrating in its 2...

    Text Solution

    |

  14. A rope, under tension of 200N and fixed at both ends, oscialltes in a ...

    Text Solution

    |

  15. A sound wave of wavelength 20pi cm travels in air if the difference be...

    Text Solution

    |

  16. AB wire (length x) is vibrating in its fundamental mode. Wire AB is in...

    Text Solution

    |

  17. A source of sound of frequency 300 Hz and a receiver are located along...

    Text Solution

    |

  18. The speed of sound in a mixture of n1=2 moles of He , n2=2 moles of H2...

    Text Solution

    |

  19. A straight line source of sound of length L=10m, emits a pulse of soun...

    Text Solution

    |

  20. A string of length 1.5 m with its two ends clamped is vibrating in fun...

    Text Solution

    |