NEET Physics Mechanical Properties of Fluids Questions Solved


A liquid drop of diameter D breaks upto into 27 small drops of equal size. If the surface tension of the liquid is σ, then change in surface energy is 

(a) πD2σ                          (b) 2πD2σ

(c) 3πD2σ                         (d) 4πD2σ

(b)

Work done = 4πR2T(n1/3-1)=4πD22(σn1/3-1)=πD2σ(271/3-1)=2πD2σ

Difficulty Level:

  • 7%
  • 57%
  • 17%
  • 20%
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