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JEE Main & Advanced Physics Thermodynamical Processes JEE PYQ-Thermodynamical Processes

  • question_answer
    A Carnot engine, whose efficiency is 40%, takes in heat from a source maintained at a temperature of 500K. It is desired to have an engine of efficiency 60%. Then, the intake temperature for the same exhaust (sink) temperature must be:                  [AIEEE 2012]

    A)  efficiency of carnot engine cannot be made larger than 50%

    B)  1200 K

    C)  750 K  

    D)       600 K

    Correct Answer: C

    Solution :

    [c] For 1st case efficiency
     
    for 2nd case


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