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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Self Evaluation Test - Thermodynamics

  • question_answer
    The temperature of source and sink of a heat engine are \[127{}^\circ C\] and \[27{}^\circ C\] respectively. An inventor claims its efficiency to be 26%, then:

    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 :

    [a] \[\eta =1-\frac{300}{400}=\frac{100}{400}=\frac{1}{4}\] \[\eta =\frac{1}{4}\times 100=25%\] Hence, it is not possible to have efficiency more than 25%.


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