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Question 30931
JEE Physics · Hard

Fluid Mechanics: Surface Tension MCQ

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Surface TensionHardQuestion 30931

Question

Excess pressure inside a soap bubble of radius r and surface tension T is:
  1. A
    T/r
  2. B
    2T/r
  3. C
    4T/r
    Correct
  4. D
    T/(2r)

Correct answer

4T/r

Explanation

Soap bubble has two surfaces (inner and outer). Each contributes 2T/r. Total excess pressure = 4T/r.

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