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MHT CET Physics question

PhysicsMechanical Properties of FluidsMHT CET

A square frame of each side 'L' is dipped in a soap solution and taken out. The force acting on the film formed is (T = surface tension of soap solution) [MHT-CET 2020]

Answer: (A)

Solution

The film has two surfaces and the perimeter is , so ; 6TL,

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Question ID VK-062313