The adjoining diagram shows three soap bubbles A, B and C prepare… - Vidyadip

MCQ

The adjoining diagram shows three soap bubbles $A, B$ and $C$ prepared by blowing the capillary tube fitted with stop cocks, $S_1$, $S_2$ and $S_3$. With stop cock $S$ closed and stop cocks $S_1$, $S_2$ and $S_3$ opened

A
B will start collapsing with volumes of $A$ and $C$ increasing
B
$C$ will start collapsing with volumes of $A$ and $ B$ increasing
✓
$C$ and $A$ both will start collapsing with the volume of $B$ increasing
D
Volumes of $A, B$ and $C$ will become equal at equilibrium

✓

Answer

Correct option: C.

$C$ and $A$ both will start collapsing with the volume of $B$ increasing

c
(c) Excess pressure inside soap bubble is inversely proportional to the radius of bubble

i.e. $\Delta P \propto \frac{1}{r}$

This means that bubbles $A$ and $C$ posses greater pressure inside it than $B$. So the air will move from $A$ and $C$ towards $B$.

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