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Physics - Fluid Question with Solution | TestHub

PhysicsFluidSurface TensionEasy2 minPYQ_2020

PhysicsEasysingle choice

In the bottom of a vessel with mercury of density $ρ$ there is a round hole of radius $r$ . At what maximum height of the mercury layer will the liquid still not flow out through this hole? (Surface tension = $T$ )

Options:

Answer:

Solution:

Because mercury meniscus is convex, the pressure just inside the hole will be less than the outside pressure by $\frac{2 T}{r}$

$∴ h ρ g = \frac{2 T}{r}$

or $h = \frac{2 T}{r ρ g}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:FluidSubtopic:Surface Tension

⏱ 2mℹ️ Source: PYQ_2020

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