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NEET2012PhysicsMechanical Properties of FluidsActual

If two soap bubbles of different radii are connected by a tube, then

Options

  1. Aair flows from bigger bubble to the smaller bubble till sizes become equal
  2. Bair flows from bigger bubble to the smaller bubble till sizes are interchanged
  3. Cair flows from smaller bubble to bigger
  4. Dthere is no flow of air

Correct answer

C. air flows from smaller bubble to bigger

Step-by-step solution

Air flows from smaller bubble to bigger as the pressure in smaller bubble is higher. Pressure inside a bubble (=P_o+ 4 S R ) When they are connected using a tube then, as smaller bubbles due to small radius has higher pressure, the air flows from smaller bubble to bigger bubble until the smaller bubble vanishes completely.

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