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J & K CET Engineering J and K - CET Engineering Solved Paper-2013

  • question_answer
    The efficiency of a Carnot engine kept at the temperatures of \[{{27}^{o}}C\] and \[{{127}^{o}}C\] is

    A)  \[20%\]  

    B)  \[25%\]  

    C)  \[30%\]   

    D)  \[40%\]

    Correct Answer: B

    Solution :

    Efficiency \[\eta =1\,-\frac{{{T}_{2}}}{{{T}_{1}}}\] Given, \[{{T}_{2}}={{27}^{o}}C=27+273=300K\] \[{{T}_{1}}={{127}^{o}}C=127+273=400K\] \[\eta =1-\frac{3}{4}=25%\]


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