A) \[J\,{{s}^{-1}}\]
B) \[J\,{{m}^{-2}}{{s}^{-1}}{{K}^{-4}}\]
C) \[J\,{{m}^{-2}}\]
D) \[J\,s\]
Correct Answer: B
Solution :
\[\frac{Q}{t}=\sigma A{{T}^{4}}\Rightarrow \sigma =J{{m}^{-2}}{{s}^{-1}}{{K}^{-4}}\]
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