A) \[e=0.18\]
B) \[e=0.02\]
C) \[e=0.2\]
D) \[e=0.15\]
Correct Answer: A
Solution :
\[a=E\,\,\,At=e\sigma ({{T}^{4}}-T_{0}^{4})At\] where, t = time \[T_{0}^{{}}\] = temperature of surrounding when\[T>{{T}_{0}}\,,\,\,Q=e\sigma {{T}^{4}}At\] \[300=e\times (5.67\times {{10}^{-8}}){{(1000)}^{4}}(5.00\times {{10}^{-4}})\] \[\text{e }=0.\text{18}\]You need to login to perform this action.
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