Question

The excess pressure in a bubble of radius R of a gas in a liquid of surface tension S is

• A. $\frac{2T}{R}$
• B. $\frac{2R}{T}$
• C. $\frac{T}{R^2}$
• D. $\frac{R^2}{T}$

Answer 1

Answer: (A)

$\frac{2T}{R}$

Answer 2

Excess pressure inside a bubble of radius R inside a liquid $=\frac{2T}{R}$ where T is the surface tension of the liquid.