First slide

Surface tension

Question

A soap bubble of radius R is surrounded by another soap bubble of radius 2R, as shown. Take surface tension = S. Then, the pressure inside the smaller soap bubble, in
excess of the atmospheric pressure, will be

Moderate

A

$\frac{4 S}{R}$
B

$\frac{3 S}{R}$
C

$\frac{6 S}{R}$
D

None of these

Solution

$P_{1} - P_{0} = \frac{4 S}{2 R} - - - - - - (i)$
$P_{2} - P_{1} = \frac{4 S}{R} - - - - - (ii)$
From (i) and (ii) $P_{2} - P_{0} = \frac{6 S}{R}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App