Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite will be

Question

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K₁ and K₂. The thermal conductivity of the composite will be

${{3\left( {{K_1} + {K_2}} \right)} \over 2}$

${K_1} + {K_2}$

$2\left( {{K_1} + {K_2}} \right)$

${{{K_1} + {K_2}} \over 2}$

Solution

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