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VMMC VMMC Medical Solved Paper-2010

  • question_answer
    A body of length 1 m having cross-sectional area \[0.75\,{{m}^{2}}\] has heat flow through it at the rate of 6000 J/s. Then find the temperature difference if \[K=200\,J{{m}^{-2}}\,{{K}^{-1}}\].

    A) \[20{}^\circ C\]

    B)                                        \[40{}^\circ C\]

    C)  \[80{}^\circ C\]                

    D)         \[100{}^\circ C\]

    Correct Answer: B

    Solution :

    The rate of heat flow, \[\frac{Q}{t}=\frac{KA\Delta \theta }{l}\] \[\Rightarrow \]               \[6000=\frac{200\times 0.75\times \Delta \theta }{1}\]                 \[\Delta \theta =\frac{6000\times 1}{200\times 0.75}=40\,{{\,}^{o}}C\]


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