Q. 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)
Explanation
(c) $\frac{dQ}{dt} = - KA\frac{d\theta}{dx}$
$\because\frac{dQ}{dt},K$ and $A$ are constants for all points
$\Rightarrow d\theta \propto - dx;i.e.,$ temperature will decrease linearly with $x$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.