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MHT CET20227 Aug 2022Morning ShiftPhysicsMechanical Properties of FluidsActual

A water drop of radius ' r ' and volume ' V ' is kept in between the two identical glass plates such that it forms a thin layer of area ' A ' between the plates. A force ' F ' is applied such that the two plates separate from each other. The surface tension ' T ' of the liquid is

Options

  1. AF V 2 A^2
  2. BA ^2 FV
  3. CAV F ^2
  4. DFV 4 ~A ^2

Correct answer

A. F V 2 A^2

Step-by-step solution

Consider complete wetting. The Laplace pressure jump is given by: On plugging into equation (1), T ( V 2 ~A ) = F A T = FV 2 ~A ^2

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