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 \[{{T}_{0}}=\]temperature of surrounding When, \[T>{{T}_{0}}\] \[Q=e\sigma {{T}^{4}}\]At \[300=e(5.67\times {{10}^{-8}}){{(1000)}^{4}}(5.00\times {{10}^{-4}})(60)\] \[e=0.18\]You need to login to perform this action.
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