M

Mr. Dubey • 52.30K Points
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Q. A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when

(A) CPA > CPB
(B) CPA < CPB
(C) kA < 0.5 kB
(D) kA >2 kB
Correct : Option (C)

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