A wall has two layers of materials A and B; each made of a different m – McqOptions

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1.	A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of materialA is twice that of B. Under the equilibrium, the temperature difference across the wall is 36 C. The temperature difference across the layer A is __________ C.
A.	6
B.	12
C.	18
D.	24
Answer» C. 18

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