1.

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.            \[-{{\gamma }^{2}}\frac{\Delta V}{V}\]
Answer» C.            \[-\gamma \frac{\Delta V}{V}\]                                       


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