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JEE Main & Advanced Physics Transmission of Heat Question Bank Radiation General Kirchoff's law Black body

  • question_answer
    Two thermometers A and B are exposed in sun light. The valve of A is painted black, But that of B is not painted. The correct statement regarding this case is [BHU (Med.) 1999; MH CET 1999]

    A)            Temperature of A will rise faster than B but the final temperature will be the same in both

    B)            Both A and B show equal rise in beginning

    C)            Temperature of A will remain more than B

    D)            Temperature of B will rise faster

    Correct Answer: A

    Solution :

               As for a black body rate of absorption of heat is more. Hence thermometer A shows faster rise in temperature but finally both will acquire the atmospheric temperature.


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