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MGIMS WARDHA MGIMS WARDHA Solved Paper-2007

  • 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        \[\frac{dQ}{dt}\propto {{(\Delta \theta )}^{n}}\] \[\therefore \]  \[n=1\]


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