A) \[410W\]
B) \[81\ W\]
C) \[405\ W\]
D) \[200\ W\]
Correct Answer: C
Solution :
Rate of energy \[\frac{Q}{t}=P=A\varepsilon \sigma {{T}^{4}}\] Þ \[P\propto {{T}^{4}}\] Þ \[\frac{{{P}_{1}}}{{{P}_{2}}}={{\left( \frac{{{T}_{1}}}{{{T}_{2}}} \right)}^{4}}\]\[={{\left( \frac{927+273}{127+273} \right)}^{4}}\]\[\Rightarrow {{P}_{1}}=405\ W\]
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