41. A cylindrical rod of length L and radius R is insulated on its surface. Its thermal conductivity k varies with temperature as k(T) = αT. If the two ends of the rod are maintained at T₁ and T₂, the heat current dQ/dt is proportional to ______.
(A) ln(T₁/T₂)
(B)
(C) T₁ - T₂
(D) T₁² - T₂²
(E) T₁³ - T₂³
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統計: A(1), B(0), C(0), D(0), E(0) #3853556
統計: A(1), B(0), C(0), D(0), E(0) #3853556