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

  • question_answer
    The length of an iron wire is L and area of cross-section is A. The increase in length is l on applying the force F on its two ends. Which of the statement is correct       [NCERT 1976]

    A) Increase in length is inversely proportional to its length L

    B)                 Increase in length is proportional to area of cross-section A

    C)                 Increase in length is inversely proportional to A

    D)                 Increase in length is proportional to Young's modulus

    Correct Answer: C

    Solution :

        \[l=\frac{FL}{YA}\Rightarrow l\propto \frac{1}{A}\]


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