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

  • question_answer
    A rod of length l and area of cross-section A is heated from 0°C to 100°C. The rod is so placed that it is not allowed to increase in length, then the force developed is proportional to                                         [NCERT 1976]

    A) l              

    B)                 \[{{l}^{-1}}\]

    C)                 A            

    D)                 \[{{A}^{-1}}\]

    Correct Answer: C

    Solution :

        \[F=YA\alpha \Delta \theta \therefore F\propto A\]


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