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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

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Understanding +4 | -1

The excess pressure inside an air bubble of radius

\text{r}

just below the surface of water is

\text{p}_1.

The excess pressure inside a drop of the same radius just outside the surface is

\mathrm{p}_2

. If

\mathrm{T}

is surface tension, then

View answer and explanation

Correct option: B

\mathrm{p}_1=\mathrm{p}_2

Option B (

\mathrm{p}_1=\mathrm{p}_2

) is correct because the excess pressure inside an air bubble just below the surface and a drop just outside the surface are both given by

\frac{{2T}}{{r}}

.

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