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MGIMS WARDHA MGIMS WARDHA Solved Paper-2010

  • question_answer
    According to Newton's law of cooling, the rate of cooling of a body is proportional to\[{{(\Delta \theta )}^{n}},\] where \[\Delta \theta \] is the difference of the temperature of the body and the surroundings, and n is equal to

    A)  2                                            

    B)  3

    C)  4                                            

    D)  1

    Correct Answer: D

    Solution :

                     According to Newton's law of cooling \[\frac{dQ}{dt}\propto \Delta \theta \] But         \[\frac{dQ}{dt}\propto {{(\Delta \theta )}^{n}}\]                           (given) \[\therefore \]  \[n=1\]


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