Question 327: Properties of Matter

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

Accepted Answer

Equivalent thermal conductivity of the composite rod in parallel combination will be,
$$K = {{{K_1}{A_1} + {K_2}{A_2}} \over {{A_1} + {A_2}}} = {{{K_1} + {K_2}} \over 2}$$

Answer

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

Answer

$${K_1} + {K_2}$$

Answer

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

Answer

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

Properties of Matter

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

Choose the correct answer: