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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-31

  • question_answer
    A wire of length L and cross-sectional area A is made of a material of Young's modulus Y. If the wire is stretched by an amount \[x\], the work done is:

    A) \[\frac{YA{{x}^{2}}}{2L}\]

    B)                    \[\frac{YA{{x}^{2}}}{L}\]

    C) \[\frac{YAx}{2L}\]                           

    D) \[\frac{YAx}{4L}\]

    Correct Answer: A

    Solution :

    \[W=\frac{1}{2}K{{x}^{2}}\]


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