Question:
The three rods shown in figure have identical geometrical dimensions. Heat flows from the hot end at a rate of $40 \mathrm{~W}$ in the arrangement
(a). Find the rates of heat flow when the rods are joined as in arrangement
(b) and in
(c). Thermal conductivities of aluminium and copper are $200 \mathrm{~W} / \mathrm{m}-{ }^{\circ} \mathrm{C}$ and $400 \mathrm{~W} / \mathrm{m}-{ }^{\circ} \mathrm{C}$ respectively.
Solution:
