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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumsingle choice

Two rods $A$ and $B$ of different materials are welded together as shown in Figure 4.42. If their thermal conductivities are $k_{1}$ and $k_{2}$ , the thermal conductivity of the composite rod will be:

Options:

Answer:

Solution:

The rods are side by side with equal cross-sections, so they are in parallel. $k_{e q} \times 2 s = k_{1} s + k_{2} s$ , which gives $k_{e q} = \frac{k _{1} + k _{2}}{2}$ . D.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

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