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

  • question_answer
    A metal rod of silver at 0°C is heated to 100°C. It's length is increased by 0.19 cm. Coefficient of cubical expansion of the silver rod is                                                            [UPSEAT 2001]

    A)            5.7 ´ 10?5/°C                         

    B)            0.63 ´ 10?5/°C

    C)            1.9 ´ 10?5/°C                         

    D)            16.1 ´ 10?5/°C

    Correct Answer: A

    Solution :

               \[\alpha =\frac{\Delta L}{{{L}_{0}}(\Delta \theta )}\]\[=\frac{0.19}{100\,(100-0)}=1.9\times {{10}^{-5}}/{}^\circ C\] Now g = 3a = 3 ´ 1.9 ´ 10?5/°C = 5.7 ´ 10?5/°C


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