Two metal rods 1 and 2 of the same length have same temperature difference between their ends. Their thermal conductivities are K_1 and K_2 and cross-section areas A_1 and A_2 respectively. What is therequired condition for the same rate of heat conduction in them?

Two metal rods 1 and 2 of the same length have same temperature differ

1.	Two metal rods 1 and 2 of the same length have same temperature difference between their ends. Their thermal conductivities are K_1 and K_2 and cross-section areas A_1 and A_2 respectively. What is therequired condition for the same rate of heat conduction in them?
Answer» SOLUTION :`(Q)/( t) = KA ( ( theta_1 - theta_2 ) )/( x )`, but `(theta_1 - theta_2)/( x )` is the same for both. For the same rate of heat conduction `KA= a` CONSTANT if `K_1 A_1 = K_2 A_2`.