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JEE Main2011PhysicsMechanical Properties of FluidsActual

Work done in increasing the size of a soap bubble from a radius of 3 ~cm to 5 ~cm is nearly (Surface tension of soap solution =0.03 Nm ⁻¹ ):

Options

  1. A0.2 mJ
  2. B2 mJ
  3. C0.4 mJ
  4. D4 mJ

Correct answer

C. 0.4 mJ

Step-by-step solution

W = T A = T 8 ( r ₂ ^2- r ₁ ^2 )=0.4 mJ

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