A) it is impossible
B) it is possible with high probability
C) it is possible with low probability
D) data are insufficient
Correct Answer: A
Solution :
Efficiency of heat engine is, |
\[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}\] or \[\eta =\frac{{{T}_{1}}-{{T}_{2}}}{{{T}_{1}}}\] |
Here, \[{{T}_{1}}=273+127=400\text{ }K\] |
\[{{T}_{2}}=273+27=300\,K\] |
\[\therefore \] \[\eta =\frac{400-300}{400}=\frac{100}{400}=0.25=25%\] |
Hence, 26% efficiency is impossible for a given heat engine. |
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