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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2008

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

    A)  two                                      

    B)  three

    C)  four                     

    D)         one

    Correct Answer: D

    Solution :

    According to Newtons 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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