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  5. Thermometry, Calorimetry & Thermal Expansion

JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Sample Paper Topic Test - Thermometry, Calorimetry & Thermal Expansion

  • question_answer
    A steel scale is calibrated for\[\text{27}{{\,}^{\text{o}}}\text{C}\text{.}\] The error in a reading of 50 cm at\[30{{\,}^{\text{o}}}\text{C}\]is \[[{{\alpha }_{steel}}=1.2\,\times \,{{10}^{-5}}/{{\,}^{o}}C]\]

    A) 0.018 mm                     

    B) 0.18 mm

    C) 0.0018 mm                   

    D) 0.16 mm

    Correct Answer: A

    Solution :

    Error, \[\Delta L=L\,\alpha \Delta T=50\times 1.2\times {{10}^{-5}}\times 3\]        =0.018 mm


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