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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumnumerical

Wires $A$ and $B$ have the same length and circular cross-sections with $R_{A} = 3 R_{B}$ . For the same temperature difference they conduct heat at the same rate. Find $\frac{K _{A}}{K _{B}}$ (two decimals).

Answer:

0.11

Solution:

Equal rates need $K_{A} R_{A}^{2} = K_{B} R_{B}^{2}$ . $\frac{K _{A}}{K _{B}} = \frac{1}{9} = 0.11$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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