The surface tension of a liquid is 5 N/m. If a film is held on a ring of area 0.02 m2, its total surface energy is about -

Engineering

Physics

Surface Tension and Surface Energy

Question

The surface tension of a liquid is 5 N/m. If a film is held on a ring of area 0.02 m², its total surface energy is about -

5 × 10^–2 J

2.5 × 10^–2 J

3 × 10^–1 J

2 × 10^–1 J

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

U = 25A
= 2 × 5 × 0.02 = 0.2 J