he ratio of the coefficient of thermal conduc | vedclass

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Question

(b) Thermal resistances are same

==> $\frac{{{l_1}}}{{{K_1}{A_1}}} = \frac{{{l_2}}}{{{K_2}{A_2}}}$ ==> $\frac{{{l_1}}}{{{K_1}}} = \frac{{{l_2

Vedclass · Accepted Answer

$5:3$

Vedclass · Answer

(b) Thermal resistances are same

==> $\frac{{{l_1}}}{{{K_1}{A_1}}} = \frac{{{l_2}}}{{{K_2}{A_2}}}$ ==> $\frac{{{l_1}}}{{{K_1}}} = \frac{{{l_2}}}{{{K_2}}}$   $(\because {A_1} = {A_2})$

==> $\frac{{{l_1}}}{{{l_2}}} = \frac{{{K_1}}}{{{K_2}}} = \frac{5}{3}$

he ratio of the coefficient of thermal conductivity of two different materials is $5 : 3$ . If the thermal resistance of the rod and thickness of these materials is same, then the ratio of the length of these rods will be

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