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MHT CET Physics question

PhysicsMechanical Properties of FluidsMHT CET

In air, a charged soap bubble of radius breaks into 27 small soap bubbles of equal radius . Then the ratio of mechanical force acting per unit area of big soap bubble to that of a small soap bubble is [MHTCET 2019]

Answer: (C)

Solution

Volume conservation gives , so . The force per unit area (excess pressure) of a soap bubble is \propto$

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Question ID VK-062132