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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

A rectangular black body of temperature 127°C has surface area 6 cm × 3 cm of rate of radiation 'E'. If its temperature is increased by 400°C and surface area is reduced to half the initial value then rate of radiation is [MHT-CET 2017]

Answer: (B)

Solution

Rate ; goes from 400 K to 800 K and area halves, so the new rate

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Question ID VK-063904