Question

The excess pressure inside a spherical drop of radius $r$ of a liquid of surface tension $T$ is

• A. Directly proportional to $r$ and inversely proportional to $T$
• B. Directly proportional to $T$ and inversely proportional to $r$
• C. Directly proportional to the product of $T$ and $r$
• D. Inversely proportional to the product of $T$ and $r$

Answer 1

Answer: (B)

Directly proportional to $T$ and inversely proportional to $r$

Excess pressure inside a spherical drop of radius rr of a liquid of surface tension TT is P=2Tr