*$_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 composite wall consists of two plates A and B placed in series no

1.	*$_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 < 0.5kB
D.	KA>2 kB
Answer» D. KA>2 kB