JEE Main & Advanced Physics Elasticity Question Bank Youngs Modulus and Breaking Stress

  • question_answer
    Density of rubber is d. A thick rubber cord of length L and cross-section area A undergoes elongation under its own weight on suspending it. This elongation is proportional to

    A) dL          

    B)                 Ad/L

    C)                 \[Ad/{{L}^{2}}\]

    D)                 \[d{{L}^{2}}\]

    Correct Answer: D

    Solution :

        Increment in length \[l=\frac{{{L}^{2}}dg}{2Y}\]\ \[l\propto {{L}^{2}}d\]


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