MHT CET Physics question

Physics Thermal Properties of Matter MHT CET

A body of surface are emits 0.3 kcal in 40 second at a temperature 70°C. The emissive power of the surface at that temperature is

(A)2.66 kcal/m s
(B) kcal/m s
(C)0.50 kcal/m sCorrect
(D) kcal/m s

Answer: (C)

Solution

Emissive power ; the energy emitted per unit area per second is 0.50 kcal/m s for the intended surface area (1.5 × 10

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Question ID VK-063399