Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are $K_{1}$ and $K_{2}$ . The thermal conductivity of the composite rod will be

Question

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K 1 and K 2 . The thermal conductivity of the composite rod will be

Aicharya · Accepted Answer

Thermal current H = H 1 + H 2 = K 1 A T 1 - T 2 d + K 2 A T 1 - T 2 d K E Q 2 A T 1 - T 2 d = A T 1 - T 2 d K 1 + K 2 K E Q = K 1 + K 2 2 .

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities…

Solution