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JEE Main & Advanced Physics Elasticity Question Bank Work Done in Stretching a Wire

  • question_answer
    On stretching a wire, the elastic energy stored per unit volume is                                   [MP PMT/PET 1988]

    A)                 \[Fl/2AL\]

    B)                 \[FA/2L\]

    C)                 \[FL/2A\]

    D)                             \[FL/2\]

    Correct Answer: A

    Solution :

    Energy stored per unit volume = \[\frac{1}{2}\left( \frac{F}{A} \right)\ \left( \frac{l}{L} \right)\]= \[\frac{Fl}{2AL}\]    


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