A) e=0.18
B) e=0.02
C) e=0.2
D) e=0.15
Correct Answer: A
Solution :
\[Q=EAt=e\,\sigma ({{T}^{4}}-T_{0}^{4})At\] Where, t = time \[{{T}_{o}}\]= temperature of surrounding When, \[T>{{T}_{o}}\] \[Q=e\,\sigma {{T}^{4}}\] At \[300=e\times (5.67\times {{10}^{-8}}){{(1000)}^{4}}\] \[(5.00\times {{10}^{-4}})(60)\] \[e=0.18\]You need to login to perform this action.
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