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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Adiabatic Process

  • question_answer
    We consider a thermodynamic system. If \[\Delta U\]represents the increase in its internal energy and W the work done by the system, which of the following statements is true [CBSE PMT 1998]

    A)            \[\Delta U=-W\] in an adiabatic process

    B)            \[\Delta U=W\]in an isothermal process

    C)            \[\Delta U=-W\]in an isothermal process

    D)            \[\Delta U=W\]in an adiabatic process

    Correct Answer: A

    Solution :

                       According to the first law of thermodynamics                    \[\Delta Q=\Delta U+\Delta W\] In adiabatic process \[\Delta Q=0\], hence \[dU=-dW\]


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