A wall has two layers A and B, each made of different material. Both the layers have the same thickness. The thermal conductivity for A is twice that of B. Under steady state, the temperature difference across the whole wall is 36°C. Then the temperature difference across the layer A is
Text Solution
Verified by ExpertsThe correct answer is:
B
K A = 2K B = 2 K
Heat current through both layers will be same
KAA = 
K B A
(36 – T) 2 K = 
T K
T = 24
Δ T = temp diff = 36 – 24 = 12
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