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

  • question_answer
    An iron bar of length 10 m is heated from 0°C to 100°C. If the coefficient of linear thermal expansion of iron is 10 ´ 10?6 /°C, the increase in the length of bar is                                                [UPSEAT 2005]

    A)            0.5 cm                                     

    B)            1.0 cm

    C)            1.5 cm                                     

    D)            2.0 cm

    Correct Answer: B

    Solution :

               Increase in length DL = L0 a Dq = 10 ´ 10 ´ 10?6 ´ (100 ? 0) = 10?2 m = 1 cm


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