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Question 30970
JEE Physics · Hard

Fluid Mechanics: Surface Tension MCQ

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

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Surface TensionHardQuestion 30970

Question

Two liquid drops of the same mass are combined into one. Change in surface energy:
  1. A
    Increases
  2. B
    Decreases
    Correct
  3. C
    Stays same
  4. D
    Depends on material

Correct answer

Decreases

Explanation

Combined drop has smaller total surface area than two separate drops (volume same, sphere has minimum surface area). Surface energy decreases — the combination is energetically favorable.

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