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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferHard2 min

PhysicsHardnumerical

A copper wire of radius 2 mm generates heat at $5 \times 1 0^{8}$ W m⁻³. Its conductivity is 400 W m⁻¹ K⁻¹ and the surface is at 100°C. Find the temperature on the axis, in °C.

Answer:

101.25

Solution:

$T (0) = T_{0} + \frac{ω R ^{2}}{4 k} = 100 + \frac{5 \times 1 0 ^{8} \times ( 2 \times 1 0 ^{- 3} ) ^{2}}{4 \times 400} = 100 + 1.25 = 101.25^{\circ}$ C.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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