JEE Main & Advanced Physics Transmission of Heat Question Bank Graphical Questions

  • question_answer
    Heat is flowing through a conductor of length l from x = 0 to x = l. If its thermal resistance per unit length is uniform, which of the following graphs is correct

    A)                                                                           

    B)                          

    C)                                 

    D)                          

    Correct Answer: C

    Solution :

                       \[\frac{dQ}{dt}=-KA\frac{d\theta }{dx}\]                    Q \[\frac{dQ}{dt},\]K and A are constants for all points \[\Rightarrow \,\,d\theta \propto -dx\]; i.e. temperature will decrease linearly with x.


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