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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumnumerical

Two rods have conductivities in the ratio 2 : 3, lengths 1 : 3 and cross-sectional areas 3 : 1. Find the ratio of their thermal resistances (two decimals).

Answer:

0.17

Solution:

$R = \frac{l}{k A}$ . $\frac{R _{1}}{R _{2}} = \frac{\frac{1}{( 2 \times 3 )}}{\frac{3}{( 3 \times 1 )}} = \frac{\frac{1}{6}}{1} = 0.17$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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