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NEET Sample Paper NEET Sample Test Paper-12

  • question_answer
    A scientist says that the efficiency of his heat engine which operates at source temperature \[{{127}^{o}}C\] and sink temperature \[{{27}^{o}}C\] is 26%, then

    A)  It is impossible

    B)  It is possible but less probable

    C)  It is quite probable

    D)  Data are incomplete

    Correct Answer: A

    Solution :

     \[{{\eta }_{\max }}=1-\frac{{{T}_{2}}}{{{T}_{1}}}=1-\frac{300}{400}=\frac{1}{4}=25%\] So 26% efficiency is impossible


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