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

Options

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

Answer

C