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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Graphical Questions

  • question_answer
               Carnot cycle (reversible) of a gas represented by a Pressure-Volume curve is shown in the diagram            Consider the following statements            I.     Area ABCD = Work done on the gas            II.    Area ABCD = Net heat absorbed            III.  Change in the internal energy in cycle = 0            Which of these are correct                                                               [AMU (Med.) 2001]             

    A)            I only                                       

    B)            II only                                      

    C)            II and III                                  

    D)            I, II and III

    Correct Answer: C

    Solution :

                       Work done by the gas (as cyclic process is clockwise) \ DW = Area ABCD                              So from the first law of thermodynamics DQ (net heat absorbed) = DW = Area ABCD            As change in internal energy in cycle DU = 0.


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