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

  • question_answer
    A thread is tied slightly loose to a wire frame as in figure and the frame is dipped into a soap solution and taken out. The frame is completely covered with the film. When the portion A punctured with a pin, the thread.                                                               [KCET 2004]

    A) Becomes concave toward A   

    B) Becomes convex towards A

    C) Remains in the initial position

    D) Either A or B depending on the size of A w.r.t. B

    Correct Answer: A

    Solution :

        Because film tries to cover minimum surface area.


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