JEE Main & Advanced Sample Paper JEE Main - Mock Test - 35

  • question_answer
    A wire elongates by i mm when a load W is hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, the elongation of the wire will be (in mm)

    A) \[2\ell \]

    B)                                zero

    C) \[\ell /2\]                                                                                                                                                                  

    D) \[\ell\]

    Correct Answer: D

    Solution :

    In first case  and in second case As tension in the wire in both the cases are equal therefore elongation in the wire will be equal.

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