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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Heat Engine Refrigerator and Second Law of Thermodynamics

  • question_answer
    A Carnot's engine used first an ideal monoatomic gas then an ideal diatomic gas. If the source and sink temperature are \[{{411}^{o}}C\] and \[{{69}^{o}}C\] respectively and the engine extracts 1000 J of heat in each cycle, then area enclosed by the PV diagram is                               [Pb. PET 2002]

    A)            100 J                                        

    B)            300 J

    C)            500 J                                        

    D)            700 J

    Correct Answer: C

    Solution :

                       \[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}=1-\frac{(273+69)}{(273+411)}=0.5\]            Þ Work done\[=\eta \times Q=0.5\times 1000=500\,J\]


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