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

  • question_answer
    Two metal strips that constitute a thermostat must necessarily differ in their      [IIT-JEE 1992]

    A)            Mass

    B)            Length

    C)            Resistivity

    D)            Coefficient of linear expansion

    Correct Answer: D

    Solution :

               Thermostat is used in electric apparatus like refrigerator, Iron etc for automatic cut off. Therefore for metallic strips to bend on heating their coefficient of linear expansion should be different.


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