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JEE Main & Advanced Physics Wave Mechanics Question Bank Self Evaluation Test - Mechanical Properties of Solids

  • question_answer
    A metal rod of Young's modulus \[2\times {{10}^{10}}N{{m}^{-2}}\] undergoes an elastic strain of 0.06%. The energy  per unit volume stored in J m-3 is

    A) 3600

    B) 7200

    C) 10800

    D) 14400

    Correct Answer: A

    Solution :

    [a] U / volume \[=\frac{1}{2}Y\times strai{{n}^{2}}=3600J{{m}^{-3}}\] \[[Strain=0.06\times {{10}^{-2}}]\]


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