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

Options

A. air flow from the bigger bubble to the smaller bubble till their sizes become equal.
B. air flow from the bigger bubble to the smaller bubble till their size are interchanged.
C. air flow from the smaller bubble to the bigger
D. there is no flow of air.

Answer

C

Explanation

`p=(2sigma)/(R)`. R is less for the smaller bubble, p is more. For the larger bubble, R is more and p is less.
Since air flows from higher pressure to lower pressure, it will flow from the smaller bubble to the larger bubble.