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MHT CET 2022 Physics question

PhysicsThermal Properties of MatterMHT CET 2022

A black sphere has radius 'R' whose rate of radiation id 'E' at temperature 'T'. If radius is made '' and temperature '3T', the rate of radiation will be

Answer: (D)

Solution

By Stefan's law, the rate of radiation (power) from a black sphere is , so . Initially . In the new state and : \propto$

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Question ID VK-094401