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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

1 Medium

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Application +4 | -1

A liquid of specific gravity 1.5 is observed to rise

3.0 \mathrm{~cm}

in a capillary tube of diameter

0.50 \mathrm{~mm}

and the liquid wets the surface of the tube. Calculate the excess pressure inside a spherical bubble of

1.0 \mathrm{~cm}

diameter blown from the same liquid. Angle of contact

=0^{\circ}

.

View answer and explanation

Correct option: A

440 \text{ dyne}/ \mathrm{cm}^2

Option A (

440 \text{ dyne}/ \mathrm{cm}^2

) is correct because the excess pressure is calculated using surface tension and the radius of the bubble.

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