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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferEasy2 min

PhysicsEasysingle choice

The conductivities of two materials are in the ratio 7 : 2. Find the ratio of the lengths of rods of these materials (same area) that have the same thermal resistance.

Options:

Answer:

Solution:

$R = \frac{l}{k A}$ gives $\frac{l _{1}}{l _{2}} = \frac{k _{1}}{k _{2}} = \frac{7}{2} = 3.5$ . B.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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