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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

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Understanding +4 | -1

If

F_C

and

F_A

denote cohesive and adhesive forces on a liquid molecule near the surface of a solid, then the surface of liquid is concave, when

View answer and explanation

Correct option: C

F_A > \frac{F_C}{\sqrt{2}}

Option C is correct because for a concave liquid surface, the adhesive forces must be strong enough to overcome the cohesive forces, specifically

F_A > \frac{F_C}{\sqrt{2}}

.

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