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

  • question_answer
    A square frame of side L is dipped in a liquid. On taking out, a membrane is formed. If the surface tension of the liquid is T, the force acting on the frame will be [MP PMT 1990; DPMT 2004]

    A) 2 TL    

    B)             4 TL

    C)             8 TL    

    D)             10 TL

    Correct Answer: C

    Solution :

                    Force on each side \[=2TL\] (due to two surfaces)             \[\therefore \] Force on the frame =\[4(2TL)=8TL\]


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