A partition wall has two layers of different materials A and B in contact with each other. They have the same thickness but the thermal conductivity of layer A is twice that of layer B. At steady state the temperature difference across the layer B is 50 K, then the corresponding difference across the layer A is (a) 50 K (b) 12.5 K (c) 25 K (d) 60 K

 

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A partition wall has two layers of different materials A and B

in contact with each other. They have the same thickness

but the thermal conductivity of layer A is twice that of layer

B. At steady state the temperature difference across the

layer B is 50 K, then the corresponding difference across

the layer A is

(a) 50 K (b) 12.5 K

(c) 25 K (d) 60 K

Answer: c