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MHT CET 2026 Physics question

PhysicsThermal Properties of MatterMHT CET 2026

Rate of radiation by a black body is 'R' at temperature 'T'. Another body has same area but emissivity is 0.2 and temperature 3T. Its rate of radiation is

Answer: (C)

Solution

By Stefan's law, rate of radiation , with for a black body. For the black body . For the second body A(3T)^4$=0.2×81 σ

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Question ID VK-097694