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JIPMER Jipmer Medical Solved Paper-2001

  • question_answer
    The temperature of perfect black body is \[727{}^\circ C\] and its area is \[0.1\,{{m}^{2}}\]. If Stefans constant is\[5.67\text{ }watt/{{m}^{2}}s{{K}^{-4}},\] then heat radiated by it in 1 minute is:

    A)  8100 cal 

    B)                                         81000 cal            

    C)         810 cal                 

    D)         81 cal

    Correct Answer: B

    Solution :

    \[Q=A\sigma t{{T}^{4}}\] \[=\frac{0.1\times 5.67\times {{10}^{-8}}\times 60\times {{(1000)}^{4}}}{4.2}\text{cal}\] \[=81000\,cal\]


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