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

  • question_answer
    Due to capillary action, a liquid will rise in a tube, if the angle of contact is    [DPMT 1984; AFMC 1988; BHU 2001]

    A) Acute  

    B)              Obtuse

    C)                 90°         

    D)                  Zero

    Correct Answer: A

    Solution :

                    \[h=\frac{2T\cos \theta }{rdg}\]. If q is less than 90° then h will be positive


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