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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Adiabatic Process

  • question_answer
    In adiabatic expansion                                           [DPMT 1999]

    A)            \[\Delta U=0\]                     

    B)            \[\Delta U=\]negative

    C)            \[\Delta U=\]positive       

    D)            \[\Delta W=\]zero

    Correct Answer: B

    Solution :

                       In case of adiabatic expansion \[\Delta W\]= positive and \[\Delta Q=0\] from FLOT \[\Delta Q=\Delta U+\Delta W\] Þ \[\Delta U=-\Delta W\] i.e., \[\Delta U\]will be negative.


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