Correct Answer - Option 4 : none of these
Concept:
Surface tension on a liquid droplet (Spherical droplet of water): Pressure intensity inside the droplet:
\(p = \frac{{4σ }}{d}\)
Surface tension on a hollow bubble (Soap bubble): Pressure intensity inside the droplet:
\(p = \frac{{8σ }}{d}\)
where σ is the surface tension of the liquid.
Calculation:
Given:
d = 4 cm, σ = 0.0736 N/m
\({\rm{Δ }}P = \frac{{8σ}}{d}\)
\({\rm{Δ }}P = \frac{{8\ \times \ 0.0736}}{0.04}\)
Δ = 14.72 N/m2
