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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2009

  • question_answer
    The amount of heat energy radiated by a metal at temperature T is E. When the temperature is increased to 3T, energy radiated is

    A)  81 E            

    B)  9 E

    C)  3 E              

    D)  27 E

    Correct Answer: A

    Solution :

    According to Stefans law\[E\propto {{T}^{4}}\] \[\therefore \] \[\frac{E}{E}={{\left( \frac{3T}{T} \right)}^{4}}\]or\[E=81E\]


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