A plane wall of thickness has its surfaces maintained at temperatures T1 and T2. The wall is made of a material whose thermal conductivity varies with temperature according to the relation k = k0 T2. Find the expression to work out the steady state heat conduction through the wall?

A plane wall of thickness has its surfaces maintained at temperature

1.	A plane wall of thickness has its surfaces maintained at temperatures T₁ and T₂. The wall is made of a material whose thermal conductivity varies with temperature according to the relation k = k₀ T². Find the expression to work out the steady state heat conduction through the wall?
A.	Q = 2A k<sub>0</sub> (T <sub>1 </sub><sup>3</sup> T <sub>2 </sub><sup>3</sup>)/3
B.	Q = A k<sub>0</sub> (T <sub>1 </sub><sup>3</sup> T <sub>2 </sub><sup>3</sup>)/3
C.	Q = A k<sub>0</sub> (T <sub>1 </sub><sup>2</sup> T <sub>2 </sub><sup>2</sup>)/3
D.	Q = A k<sub>0</sub> (T <sub>1</sub> T <sub>2</sub>)/3
Answer» C. Q = A k<sub>0</sub> (T <sub>1 </sub><sup>2</sup> T <sub>2 </sub><sup>2</sup>)/3