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

  • question_answer
    The figure given below shows the cooling curve of pure wax material after heating. It cools from A to B and solidifies along BD. If L and C are respective values of latent heat and  the specific heat of the liquid wax, the ratio L/C is

    A)            40  

    B)            80

    C)            100

    D)            20

    Correct Answer: D

    Solution :

                       Let the quantity of heat supplied per minute be Q. Then quantity of heat supplied in 2 min \[=mC(90-80)\] In 4 min, heat supplied \[=2m\,C(90-80)\] \ \[2m\,C(90-80)=m\,L\] Þ \[\frac{L}{C}=20\]


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