$A$ wall has two layers $A$ and $B$ made of different materials. The thickness of both the layers is the same. The thermal conductivity of $A$ and $B$ are $K_A$ and $K_B$ such that $K_A = 3K_B$. The temperature across the wall is $20°C$ . In thermal equilibrium
$A$ wall has two layers $A$ and $B$ made of different materials. The thickness of both the layers is the same. The thermal conductivity of $A$ and $B$ are $K_A$ and $K_B$ such that $K_A = 3K_B$. The temperature across the wall is $20°C$ . In thermal equilibrium
- A
The temperature difference across $A = 15^\circ C$
- B
The temperature difference across $A = 5^\circ C$
- C
The temperature difference across $A$ is $10°C$
- D
The rate of transfer of heat through $A$ is more than that through $B$ .
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