NEET Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन NEET PYQ-Fluid Mechanics, Surface Tension and Viscosity

  • question_answer
    Water rises to a height W in capillary tube. If the length of capillary tube above the surface of water is made less than ‘A’, then                                                                                                                                        [NEET 2015 (Re)]

    A)  water rises upto the tip of capillary tube and then starts over flowing like a fountain

    B)  water rises upto the top of capillary tube and stays there without overflowing

    C)  water rises upto a point a little below the top and stays there

    D)  water does not rise at all

    Correct Answer: C

    Solution :

    It is given that water rises to a height ‘h’ in capillary tube. So, the length of capillary tube above the surface water is made less than 'h, then height of water column > length of capillary tube.             \[\Rightarrow \] So, liquid will be stay there.


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