A wall has two layers 
and 
, each made of different material. Both the layers have the same thickness. The thermal conductivity for 
is twice that of 
and under steady condition, the temperature difference across the wall is 
. The temperature difference across the layer 
is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Suppose 
Heat current ， 
Temperature difference across 
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