A) \[1.7\times {{10}^{10}}J\]
B) \[1.1\times {{10}^{12}}J\]
C) \[2.8\times {{10}^{8}}J\]
D) \[4.6\times {{10}^{6}}J\]
Correct Answer: A
Solution :
According to Stefan9 slaw\[E=\sigma {{T}^{4}}\] Heat radiated per unit area in 1 hour (3600s) is\[=5.7\times {{10}^{-8}}\times {{(300)}^{4}}3600=1.7\times {{10}^{10}}J\]
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