Question

Two bubbles A and B $( A > B )$ are joined through a narrow tube. Then

• A. The size of A will increase
• B. The size of B will increase
• C. The size of B will increase until the pressure equals
• D. None of these

Answer 1

Answer: (A)

The size of A will increase

Answer 2

$r _ { A } > r _ { B }$ and $P \propto \frac { 1 } { r }$ so $P _ { A } < P _ { B }$

So air will flow from B to A i.e. size of A will increase.