A body at a temperature of 27 ° C emits heat energy at a rate of 0 . 3 W , then at 627 ° C , it emits heat at a rate of

Question

A body at a temperature of 27 ° C emits heat energy at a rate of 0 . 3 W , then at 627 ° C , it emits heat at a rate of, 24 . 3 W, 0 . 42 W, 2 . 42 W, 0 . 9 W

MARKS App · Accepted Answer

u ∝ T 4 u 2 u 1 = T 2 T 1 4 = 9 0 0 3 0 0 4 (Temperature should be in kelvin) ⇒ u 2 u 1 = 8 1 ⇒ u 2 = 8 1 u 1 = 24.3 W

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