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

  • question_answer
    A soap bubble is blown with the help of a mechanical pump at the mouth of a tube. The pump produces a certain increase per minute in the volume of the bubble, irrespective of its internal pressure. The graph between the pressure inside the soap bubble and time t will be-

    A)

    B)

    C)                      

    D)                              

    Correct Answer: A

    Solution :

    \[\Delta P=\frac{4T}{r}\]\ \[\Delta P\propto \frac{1}{r}\] As radius of soap bubble increases with time \\[\Delta P\propto \frac{1}{t}\]


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