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NEET Sample Paper NEET Sample Test Paper-29

  • question_answer
    If the tension and diameter of a sonometer wire of fundamental frequency n is doubled and density is halved then its fundamental frequency will become

    A)  \[\frac{n}{4}\]                       

    B)  \[\sqrt{2}\,n\]

    C)  \[n\]                   

    D)  \[\frac{n}{\sqrt{2}}\]

    Correct Answer: C

    Solution :

    \[n=\frac{1}{2\,\ell }\sqrt{\frac{2T}{\pi {{(2r)}^{2}}\frac{\rho }{2}}}=\frac{1}{2\ell }\,\sqrt{\frac{T}{\pi {{r}^{3}}\rho }}=n\] \[\Rightarrow \] No change       


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