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Physics - Fluid Question with Solution | TestHub

PhysicsFluidSurface TensionEasy2 minPYQ_2023

PhysicsEasysingle choice

Three liquids have same surface tension and densities $ρ_{1}, ρ_{2}$ , and $ρ_{3} (ρ_{1} > ρ_{2} > ρ_{3})$ . In three identical capillaries rise of liquid is same. The corresponding angles of contact $θ_{1}, θ_{2}$ and $θ_{3}$ are related as

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Answer:

Solution:

Rise in capillary tube, $h = \frac{2 T c o s θ}{rpg}$ Given that, $h, T, r$ and $g$ are constant. $∴ ∴ \frac{c o s θ}{ρ} = constant i.e., \frac{c o s θ _{1}}{ρ _{1}} = \frac{c o s θ _{2}}{ρ _{2}} = \frac{c o s θ _{3}}{ρ _{3}} as ρ_{1} > ρ_{2} > ρ_{3} cos θ_{1} > cos θ_{2} > cos θ_{3} θ_{1} < θ_{2} < θ_{3}$

Stream:MHT_CETSubject:PhysicsTopic:FluidSubtopic:Surface Tension

⏱ 2mℹ️ Source: PYQ_2023

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