Question

If the excess pressure in a soap bubble is $p$, the excess pressure in an air bubble is:

• A. $\frac{p}{2}$
• B. $p$
• C. $2p$
• D. $4p$

Answer 1

The correct option is A $\frac{p}{2}$

In soap bubble, there will be two free surface. So, excess pressure will be double than that in an air bubble. So, air bubble is $p/2$.