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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1995

  • question_answer
    Length of a piano wire is \[1.1\,m\]and its mass is \[160g\]. If its frequency is \[33Hz\], then tension in wire in newton is:

    A) \[556\,N\]          

    B)                        \[~635\,N\]       

    C)         \[766\,N\]         

    D)                         \[995\,N\]

    Correct Answer: C

    Solution :

    Frequency \[n=\frac{1}{2}\sqrt{\frac{T}{ml}}\] \[33=\frac{1}{2}\sqrt{\frac{T}{160\times {{10}^{-3}}\times 1.1}}\] \[T=766N\]


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