Three rods of identical cross-section and lengths are made of three different materials of thermal conductivity K₁, K₂, and K₃, respectively. They are joined together at their ends to make a long rod (see figure). One end of the long rod is maintained at 100^{}{C} and the other at 0^{}{C} (see figure). If the joints of the rod are at 70^{}\,{C} and 20^{}{C} in steady state and there is no loss of energy from the surface of the rod, the correct relationship between K₁, K₂ and K₃ is : [6 Sep 2020 Shift 2]

Question

Examsnet · Accepted Answer

Correct Answer is : K1:K3=2:3K₁:K₃=2:3K1​:K3​=2:3; K2:K3=2:5K₂:K₃=2:5K2​:K3​=2:5

Thermodynamics Part 2