A) \[{{227}^{o}}C\]
B) \[{{327}^{o}}C\]
C) \[{{127}^{o}}C\]
D) \[{{27}^{o}}C\]
Correct Answer: C
Solution :
\[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}\Rightarrow \frac{25}{100}=1-\frac{300}{{{T}_{1}}}\Rightarrow \frac{1}{4}-\frac{300}{{{T}_{1}}}\] \[{{T}_{1}}=400\,K=127{{\,}^{o}}C\]
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