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

  • question_answer
    The energy supply being cut-off, an electric heater element cools down to the temperature of its surroundings, but it will not cool further because                                    [CPMT 2001]

    A)            Supply is cut off 

    B)            It is made of metal

    C)            Surroundings are radiating

    D)            Element & surroundings have same temp.

    Correct Answer: D

    Solution :

               When element and surrounding have same temperature. There will be no temperature difference, hence heat will not flow from the filament and it?s temperature remains constant.


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