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A wall is made of two layers A and B of the same thickness but different materials as shown. The thermal conductivity of A is thrice that of B. In steady state, the temperature difference across the wall is 360C. The temperature difference across the layer A is :
  • a)
    60 C
  • b)
    90 C
  • c)
    180 C
  • d)
    270 C
Correct answer is option 'B'. Can you explain this answer?
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A wall is made of two layers A and B of the same thickness but differe...
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A wall is made of two layers A and B of the same thickness but differe...
The two are in series.
KA = 3KB
i.e thermal resistance of A(say RA) is one third that of B(say RB)
i.e RB = 3RA
 
 
∴ Temperature difference across 'A' = 
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A wall is made of two layers A and B of the same thickness but different materials as shown. The thermal conductivity of A is thrice that of B. In steady state, the temperature difference across the wall is 360C. The temperature difference across the layer A is :a)60 Cb)90 Cc)180 Cd)270 CCorrect answer is option 'B'. Can you explain this answer?
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