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NEET Sample Paper NEET Sample Test Paper-36

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

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

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

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

    D)  \[\text{100 }\!\!{}^\circ\!\!\text{ C}\]

    Correct Answer: B

    Solution :

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


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