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Question 30936
JEE Physics · Hard

Fluid Mechanics: Surface Tension MCQ

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Surface TensionHardQuestion 30936

Question

A liquid drop of radius R splits into 8 equal drops. Change in surface area is:
  1. A
    4πR²
    Correct
  2. B
    8πR²
  3. C
    Same
  4. D
    16πR²

Correct answer

4πR²

Explanation

Volume: (4/3)πR³ = 8×(4/3)πr³ → r = R/2. Initial SA = 4πR². Final SA = 8×4π(R/2)² = 8πR². Increase = 4πR².

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