MCQ
The surface tension of a liquid is $5\, N/m$. If a thin film of the area $0.02\, m^2$ is formed on a loop, then its surface energy will be
- A$5 \times {10^2}\,J$
- B$2.5 \times {10^{ - 2}}\,J$
- ✓$2 \times {10^{ - 1}}\,J$
- D$5 \times {10^{ - 1}}\,J$