Home
Class 12
PHYSICS
The frequency of vibration of 20cm lengt...

The frequency of vibration of 20cm length of a sonometer wire (linear density is 0.0294 gm/cm) under a tension 3kg wt is (g=`980cm//s^2`)

A

750Hz

B

250Hz

C

500Hz

D

125Hz

Text Solution

Verified by Experts

The correct Answer is:
B
`n=(1)/(2l) sqrt(T/m) = (1)/(2xx20) sqrt((3000xx980)/(0.294))`
`=1/40xxsqrt((294xx10^4)/(294xx10^(-4)))`
`=1/40 sqrt(108) = 104/40`
`=(10000)/(40)`
`=250Hz`
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTORS

    NIKITA PUBLICATION|Exercise MCQS|350 Videos

  • SURFACE TENSION

    NIKITA PUBLICATION|Exercise Multiple Choice Questions (Question Given in MHT-CET )|31 Videos

Similar Questions

Explore conceptually related problems

A wave pulse is travelling on a string of linear mass density 1.0 g cm^(-1) under a tension of 1 kg wt. Calculate the time taken by the pulse to travel a distance of 50 cm on the string.Given g = 10 ms^(-2) .

A string tensioned by 4.5kg resonates at two consecutive frequencies 420Hzand 490.Calculate the length of the srting its linear density is 5 mg per cm .Take g=10m//s^(2)

The frequency of the note emitted by a silver wire 1 mm in diameter and 50 cm in length is 256 Hz.Find the tension in the wire, if density of silver is 10.5 g cm^(-3) .

Two tuning frok when sounded together give 4 beats per second.One is in unison with a length of 96 cm of a sonometer wire under a certain tension and the with 97 cm of the same wire under tension.Find the frequencies of the forks

Two tuning forks produce 5 beats when sounded together. A is in unison with 40 cm length of a sonometer wire under a constant tension and B is in unison with the same wire of length 40.5 cm under the same tension. Calculate of the forks.

A wire of length 20cm is stretched by a load of 1kg wt. if the linear density of the wire is 0.01 gm/cm, then the speed of the transverse waves on the wire will be

A tuning fork vibrating with a sonometer having 20 cm wire produces 5 beats per second. The beat frequency does not change if the length of the wire is changed to 21 cm. The frequency of the tuning fork (in Hertz) must be

A mass of 10 gm is suspended by a string and the entire system is falling with a uniform acceleration of . 400cm//sec^(2) The tension in the string will be (g=980cm//sec^(2))

NIKITA PUBLICATION-STATIONARY WAVES -MCQs
  1. A sonometer wire of length 100cm has fundamental frequency of 320Hz. ...

    Text Solution

    |

  2. The frequency of the note produced by a sonometer wire will be decreas...

    Text Solution

    |

  3. The frequency of vibration of 20cm length of a sonometer wire (linear ...

    Text Solution

    |

  4. A stretched wire 60cm long emits a fundamental frequency of 240 Hz. B...

    Text Solution

    |

  5. The string of monochord , vibrates 100 times a second. Its length is d...

    Text Solution

    |

  6. A sonometer wire is in unison with a tuning fork keeping the tension u...

    Text Solution

    |

  7. The frictionless pulley in melde's experiment plays the role of

    Text Solution

    |

  8. The number of loops in perpendicular position in melde's experiment in...

    Text Solution

    |

  9. Melde's experiment in perpendicular positon , the frequency of the str...

    Text Solution

    |

  10. The frequency of vibrating string, in melde's experiment in parallel p...

    Text Solution

    |

  11. In parallel position of melde's experiment, string vibrates

    Text Solution

    |

  12. The frequency of the vibrating tuning fork in parallel position in mel...

    Text Solution

    |

  13. The frequency of the vibrating tuning fork in perpendicular position i...

    Text Solution

    |

  14. The number of loops in parallel position in melde's experiment in equ...

    Text Solution

    |

  15. A student performs the melde's experiment in parallel and perpendicula...

    Text Solution

    |

  16. In melde's experiment, when tension in the string is 100gm wt and the ...

    Text Solution

    |

  17. In melde's experiment, 3 loops are formed when a mass of 25gm is put i...

    Text Solution

    |

  18. In Melde's experiment the srting vibrates in 4 loops when a 50 g weig...

    Text Solution

    |

  19. If there are six loops for 1 m length in transverse mode of melde's ex...

    Text Solution

    |

  20. In melde's experiment , 3 loops are formed of by putting a weight of ...

    Text Solution

    |