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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

A black sphere has radius 'R' whose rate of radiation is 'E' at temperature 'T'. If radius is made '' and temperature '3T', the rate of radiation will be [MHT-CET 2020]

Answer: (D)

Solution

Rate of radiation , so the new rate

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Question ID VK-063865