MHT CET Physics question

Coefficient of emission or emissivity (e) is defined as

(A)Ratio of emissive power of a body to that of a emissive power of perfectly black surface at the same temperatureCorrect
(B)Product of the emissive powers of the body and perfectly black body at the same temperature
(C)Ratio of emissive power of the body to that of perfectly black body
(D)Product of emissive powers of the body and perfectly black body

Answer: (A)

Solution

Emissivity is the ratio of the emissive power of the body to that of a perfectly black body at the same

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Question ID VK-063309