Heat TransferMedium
Question
A black body, at a temperature of 727oC, radiates heat at a rate of 20 cal m-2s-1. When its temperature is raised to 727oC, the heat radiated by it in cal m-2s-1will be closest to:
Options
A.40
B.160
C.320
D.640
Solution
We know that
we E = σT4 ⇒
⇒ E1 = 20 × 16 = 320 cal m-2s-1
we E = σT4 ⇒
⇒ E1 = 20 × 16 = 320 cal m-2s-1
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