JEE Main & Advanced Sample Paper JEE Main - Mock Test - 44

  • question_answer
    Two circular discs A and B with equal radii are blackened.  They  are  heated to  same temperature and are cooled under identical conditions, then

    A) A and B have same specific heats

    B) Specific heat of A is less

    C) Specific heat of B is less

    D) Nothing came be said.

    Correct Answer: B

    Solution :

    [b] \[-\frac{dT}{dt}=\frac{4\sigma eA{{T}_{0}}^{3}}{ms}(T-{{T}_{0}})\] \[-\frac{dT}{dt}\propto \frac{1}{s}\]


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