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  • Two plates A and B have thermal conductivities 84 Wm-1 K-1 and 126 Wm-1K-1 respectively. They have same surface area and same thickness. They are pl

Two plates A and B have thermal conductivities 84 Wm-1 K-1 and 126 Wm-1K-1 respectively. They have same surface area and same thickness. They are placed in contact along their surfaces. If the temperatures of the outer surfaces of A and B are kept at 100oC and 0oC respectively, then the temperature of the surface of contact in steady state is ______ oC.

Option: 1

40


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

\begin{aligned} & \frac{K_A A\left(T_A-T\right)}{L}=\frac{K_{\mathrm{B}} A\left(T-T_B\right)}{L} \\ & 84(100-T)=126(T-0) \\ & T=40^{\circ} \mathrm{C} \end{aligned}

Posted by

Pankaj Sanodiya

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