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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Graphical Questions

  • question_answer
    In the diagrams (i) to (iv) of variation of volume with changing pressure is shown. A gas is taken along the path ABCD. The change in internal energy of the gas will be [CPMT 1986, 88]

    A)            Positive in all cases (i) to (iv) 

    B)            Positive in cases (i), (ii) and (iii) but zero in (iv) case

    C)            Negative in cases (i), (ii) and (iii) but zero in (iv) case

    D)            Zero in all four cases

    Correct Answer: D

    Solution :

               In all given cases, process is cyclic and in cyclic process DU = 0.


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