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NEET Sample Paper NEET Sample Test Paper-3

  • question_answer
    Time period of a disc about a tangent parallel to the diameter is same as the time period of a simple pendulum. The ratio of radius of disc to the length of pendulum is:

    A)  \[\frac{1}{4}\]                     

    B)  \[\frac{4}{5}\]

    C)  \[\frac{2}{3}\]                       

    D)  \[\frac{1}{2}\]

    Correct Answer: B

    Solution :

        \[{{T}_{disc}}=2\pi \sqrt{\frac{1}{mgd}}=2\pi \sqrt{\frac{5R}{4g}}\] \[{{T}_{pendulum}}=2\pi \sqrt{\frac{l}{g}}\]             \[\therefore \]     \[\frac{R}{l}=\frac{4}{5}\]


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