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

  • question_answer
    If the energy input to a Carnot engine is thrice the work it performs then, the fraction of energy rejected to the sink is

    A) \[\frac{1}{3}\]

    B) \[\frac{1}{4}\]

    C) \[\frac{2}{5}\]

    D) \[\frac{2}{3}\]

    Correct Answer: D

    Solution :

    [d] Efficiency \[\eta =\frac{{{W}_{output}}}{Hea{{t}_{input}}}\frac{w}{3w}=\frac{1}{3}\] \[\eta =1-\frac{{{Q}_{2}}}{{{Q}_{1}}}=\frac{1}{3}\text{           }\therefore \frac{{{Q}_{2}}}{{{Q}_{1}}}=\frac{2}{3}\text{ }\]


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