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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Isothermal Process

  • question_answer
    For an isothermal expansion of a perfect gas, the value of \[\frac{\Delta P}{P}\] is equal                                [CPMT 1980]

    A)            \[-{{\gamma }^{1/2}}\frac{\Delta V}{V}\]                   

    B)            \[-\frac{\Delta V}{V}\]

    C)            \[-\gamma \frac{\Delta V}{V}\]                                       

    D)            \[-{{\gamma }^{2}}\frac{\Delta V}{V}\]

    Correct Answer: B

    Solution :

                       Differentiate \[PV=\]constant w.r.t V            Þ \[P\Delta V+V\Delta P=0\]Þ \[\frac{\Delta P}{P}=-\frac{\Delta V}{V}\]


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