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NEET Sample Paper NEET Sample Test Paper-93

  • question_answer
    The moment of inertia of a regular circular disc of mass 0.4 kg and radius 100 cm about the axis perpendicular to the plane of the disc and passing through its centre is

    A) \[0.002\,\,kg\,{{m}^{2}}\]        

    B)        \[0.02\,\,kg\,{{m}^{2}}\]

    C) \[2\,\,kg\,{{m}^{2}}\]  

    D)        \[0.2\,\,kg\,{{m}^{2}}\]

    Correct Answer: D

    Solution :

    [d] Moment of inertia of disc about its axis \[=\frac{1}{2}m{{r}^{2}}=\frac{1}{2}\times 0.4\times {{\left( \frac{100}{100} \right)}^{2}}\] \[=\frac{1}{2}\times 0.4=0.2\,kg{{m}^{2}}\]


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