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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

A black rectangular surface of area 'A' emits energy 'E' per second at C. If length and breadth is reduced to (1/3)rd of its initial value and temperature is raised to C then energy emitted per second becomes [MHT-CET 2022]

Answer: (C)

Solution

; the area becomes and changes from 300 K to 600 K (factor 2, so factor 16), giving

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Question ID VK-065950