A Slab of Material Has Area A, Thickness L, and Thermal

Multiple Choice

A slab of material has area A, thickness L, and thermal conductivity k.One of its surfaces (P) is maintained at temperature T₁ and the other surface (Q) is maintained at a lower temperature T₂.The rate of heat flow from P to Q is:

A) kA(T₁ - T₂) /L²
B) kL(T₁ - T₂) /A
C) kA(T₁ - T₂) /L
D) k(T₁ - T₂) /(LA)
E) LA(T₁ - T₂) /k