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