Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoRadiationMedium2 minQB

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A body radiates energy 5W at a temperature of 127°C. If the temperature is increased to 927°C, then it radiates energy at the rate of-

Answer:

Solution:

Rate of energy $\frac{Q}{t} = P = A ε σ T^{4} \Rightarrow P \propto T^{4}$

$\Rightarrow \frac{P _{2}}{P _{1}} = (\frac{T _{2}}{T _{1}})^{4} = (\frac{927 + 273}{127 + 273})^{4} \Rightarrow P_{2} = 5 \times 81 = 405 W$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Radiation

⏱ 2mℹ️ Source: QB

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