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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumnumerical

A spherical black body of radius 10 cm radiates 200 W at 400 K. If the radius is halved and the temperature is raised to 600 K, find the power radiated in watts (one decimal).

Answer:

253.10

Solution:

The area becomes $\frac{1}{4}$ and $T^{4}$ rises by $1.5^{4} = 5.0625$ . $P = 200 \times \frac{1}{4} \times 5.0625 = 253.1$ W.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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