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