The excess of pressure inside a soap bubble than that of the outer pressu

Discussion Forum : Mechanical Properties Of Fluids

Question -

The excess of pressure inside a soap bubble than that of the outer pressure is

Options:

A .

\frac{2 T}{r}

B .

\frac{4 T}{r}

C .

\frac{T}{2 r}

D .

\frac{T}{r}

Answer: Option B
:
B

The pressure inside the bubble is more than outside. Inside pressure -outside pressure =excess pressure. In the case of bubble excess pressure = 4S/R. where s is the surface tension and r is the radius.

$△ P = \frac{4 T}{r}$

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Discussion Forum : Mechanical Properties Of Fluids

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