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MHT CET202013 Oct 2020Evening ShiftPhysicsMechanical Properties of FluidsActual

The excess pressure inside a spherical drop of water is three times that of another drop of water. The ratio of their surface area is

Options

  1. A3: 1
  2. B6: 1
  3. C1: 9
  4. D1: 3

Correct answer

C. 1: 9

Step-by-step solution

Excess pressure p= 2 T r p₁ p₂ = r₂ r₁ =3 array l r₂=3 r₁ A₁ A₂ = r₁² r₂² = ( r₁ r₂ )²= 1 (3)² = 1 9 array

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