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Question 30996
JEE Physics · Hard

Fluid Mechanics: Surface Tension Advanced MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Surface Tension AdvancedHardQuestion 30996

Question

Soap film on a frame: when the film is stretched, work done against surface tension is stored as:
  1. A
    Kinetic energy
  2. B
    Heat only
  3. C
    Surface energy
    Correct
  4. D
    Electrical energy

Correct answer

Surface energy

Explanation

Stretching a soap film increases its area, increasing surface energy = T × ΔArea (for two surfaces). This energy is recoverable — the film contracts if released.

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