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JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank Topic Test - Thermometry, Thermal Expansion and Calorimetry (3-5-21)

  • question_answer
    An iron bar of length 10 m is heated from \[0{}^\circ C\] to \[100{}^\circ C\]. If the coefficient of linear thermal expansion of iron is \[10\times {{10}^{\,6}}/{}^\circ C\], the increase in the length of bar is

    A) 0.5 cm

    B) 1.0 cm

    C) 1.5 cm

    D) 2.0 cm

    Correct Answer: B

    Solution :

                   Increase in length\[\Delta L={{L}_{0}}\,\alpha \,\Delta \theta \]\[=10\times 10\times {{10}^{-6}}\times (100-0)={{10}^{-2}}m=1\,cm\]


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