Question

Two soap bubbles of different radii are in contact with each other. Then_____

• A. air follows from the larger bubble into smaller bubble till both bubbles acquire same size
• B. air follows from the smaller bubble into larger bubble and the larger bubble grows in size of the smaller bubble
• C. air does not flow but the sizes of the bubbles changes
• D. sizes of the bubbles remain unchanged

Answer 1

The correct option is B air follows from the smaller bubble into larger bubble and the larger bubble grows in size of the smaller bubble

We know that excess pressure is inversely proportional to the radius. So the smaller bubble will have more excess pressure than bigger bubble. So the air will flow from smaller bubble to bigger bubble and bigger bubble will continue to grow at the expense of smaller one. So the correct choice is 'B'.