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 $${{K}_{A}}=3{{K}_{B}}$$. The temperature across the wall is $$20{}^\circ C$$. In thermal equilibrium

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The temperature difference across A is $$10{}^\circ C$$

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The temperature difference across $$A=15{}^\circ C$$

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The temperature difference across $$A=5{}^\circ C$$

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The rate of transfer of heat through A is more than that through B.

1.	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 \[{{K}_{A}}=3{{K}_{B}}\]. The temperature across the wall is \[20{}^\circ C\]. 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 \[10{}^\circ C\]
D.	The rate of transfer of heat through A is more than that through B.
Answer» C. The temperature difference across A is \[10{}^\circ C\]

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 \[{{K}_{A}}=3{{K}_{B}}\]. The temperature across the wall is \[20{}^\circ C\]. In thermal equilibrium

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