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JEE Main & Advanced Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन Question Bank Pressure and Density

  • question_answer
    A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will

    A)            Increases                               

    B)            Decreases                             

    C)            Remain constant                

    D)            First decrease and then increase

    Correct Answer: B

    Solution :

                       Total pressure at (near) bottom of the liquid                    \[P={{P}_{0}}+h\rho g\]            As air is continuously pumped out from jar (container), \[{{P}_{0}}\] decreases and hence P decreases.


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