CET Karnataka Medical CET - Karnataka Medical Solved Paper-2003

  • question_answer
    Youngs modulus of perfectly rigid body material is:

    A)  infinite

    B)  zero

    C)  \[10\times {{10}^{10}}N/{{m}^{2}}\]

    D)  \[1\times {{10}^{10}}N/{{m}^{2}}\]

    Correct Answer: A

    Solution :

    Youngs modulus of a material is given by   \[Y=\frac{F\times L}{A\times \Delta L}\]                                where F \[\to \]applied force                              A \[\to \]area of cross-section                         L \[\to \]initial length                               \[\Delta L\] \[\to \]change in length For a perfectly rigid body, \[\Delta L=0\] \[\therefore \] \[Y=\infty \]   (infinite)


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