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JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank Thermal Expansion

  • question_answer
    If a cylinder of diameter 1.0 cm at 30°C is to be solid into a hole of diameter 0.9997 cm in a steel plate at the same temperature, then minimum required rise in the temperature of the plate is : (Coefficient of linear expansion of steel \[=12\times {{10}^{-6}}/{}^\circ C\])                                                                        [EAMCET 2001]

    A)            25°C                                         

    B)            35°C

    C)            45°C                                         

    D)            55°C

    Correct Answer: A

    Solution :

               \[\alpha =\frac{\Delta L}{{{L}_{0}}\Delta \theta }=\frac{(1-0.9997)}{0.9997\times 12\times {{10}^{-6}}}=25{}^\circ C\]


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