Home Physics Fluid Mechanics NEET Previous Year Question If a soap bubble expands, the pressure insid…
Physics Fluid Mechanics NEET Previous Year Question MCQ (Single Correct)

If a soap bubble expands, the pressure inside the bubble [NEET 2022]

A
increases
B
remains the same
C
is equal to the atmospheric pressure
D
decreases

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Verified by Experts
The correct answer is:
D

We know that pressure inside the soap bubble of radius is given as,

where, T is surface tension.

… (i)

Therefore, when soap bubble expands, then its radius increases, hence from Eq. (i), pressure inside it will decrease.

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