MHT CET 2025 Physics question

Physics Mechanical Properties of Fluids MHT CET 2025

The amount of work done in blowing a soap bubble such that its diameter increases from to is (T = surface tension of soap solution)

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

A soap bubble has two free surfaces (inner and outer). Work done = surface tension increase in surface area . With : \dfrac{d_2^2}{4}$ -

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Question ID VK-102342