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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

The rectangular surface of area 8 cm 4 cm of black body at a temperature of C emits energy at the rate of per second. If the length and breadth of the surface are each reduced to half of its initial value and the temperature is raised to C, the rate of emission of energy will become

Answer: (D)

Solution

Energy per second ; area becomes and goes from 400 K to 600 K, so the rate becomes

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Question ID VK-063674