The adjoining diagram shows three soap bubbles, A , B and C prepared by blowing the capillary tube fitted with stop cocks S, `S_(1),S_(2)` and `S_(3)` with stop cock S closed and stop cocks `S_(1),S_(2)` and `S_(3)` opened-

Options

A. Both C and A will start collapsing with the size of B increasing
B. Sizes of A,B and C will becomes equal at equalibrium
C. B will start collapsing with sizes of A and C increasing
D. C will start collapsing with sizes of A and B increasing

Answer

A

Explanation

Excess pressure in a soap bubble is `(4T)/R` i.e `P prop 1/R`
` :. P_(A) gt P_(B)and P_(C) gt P_(B)`
` :. ` Air will flow from A and C to B.
` :. ` A and C will start collapsing with size of B increasing .