Equal temperature difference exists between the ends of two metallic rods 1 and 2 of equal - length. Their thermal conductivities are `K_(1)andK_(2)` and cross sectional areas are respectively `A_(1)andA_(2)`. The condition for equal rate of heat transfer will be

Options

A. `K_(1)A_(2)=K_(2)A_(1)`
B. `K_(1)A_(2)^(2)=K_(2)A_(1)^(2)`
C. `K_(1)A_(1)=K_(2)A_(2)`
D. `K_(1)A_(1)^(2)=K_(2)A_(2)^(2)`

Answer

C