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The velocity of sound in a gas, in which two wavelengths 4.08m and 4.16m produce 40 beats in 12s, will be:

Option 1 -

282.8 ms-1

Option 2 -

175. 5 ms-1

Option 3 -

353.6 ms-1

Option 4 -

707.2 ms-1

 

0 2 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • R

    Answered by

    Raj Pandey | Contributor-Level 9

    a month ago
    Correct Option - 4


    Detailed Solution:

    | f 1 − f 2 | = 4 0 1 2 = 1 0 3

    ⇒ v ( 1 λ 1 − 1 λ 2 ) = 1 0 3

    ⇒ V = 1 0 3 × λ 1 λ 2 λ 2 − λ 1 = 1 0 3 × 4 . 0 8 × 4 . 1 6 . 0 8 = 1 0 3 × 4 0 8 × 4 . 1 6 8 = 7 0 7 . 2 m / s

     

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