MHT CET202620 April 2026Morning ShiftPhysicsMechanical Properties of FluidsActual

The excess pressure inside a soap bubble of radius 2.5 cm is 48 dyne/cm ^2 . The surface tension of soap solution in dyne /cm is

Options

Correct answer

B. 30

Step-by-step solution

The excess pressure inside a soap bubble is given by P = 4T R where T is the surface tension and R is the radius of the bubble. Given, P = 48 dyne/cm ^2 and R = 2.5 cm. Substituting the values, we get: 48 = 4T 2.5 T = 48 2.5 4 T = 12 2.5 = 30 dyne/cm Answer: 30

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