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Physics - Fluid Question with Solution | TestHub

PhysicsFluidSurface TensionEasy2 minPYQ_2020

PhysicsEasysingle choice

In a U-tube the radii of two columns are respectively $r_{1}$ and $r_{2}$ . When a liquid of density $ρ$ , contact angle $(θ = 0^{o})$ is filled in it, a level difference of $h$ is observed in the two arms, then the surface tension of the liquid is

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Answer:

Solution:

$ρ g h = 2 T (\frac{1}{r_{1}} - \frac{1}{r_{2}}) = 2 T (\frac{r_{2} - r_{l}}{r_{1} r_{2}})$

$∴ T = \frac{ρ g h r_{1} r_{2}}{2 (r_{2} - r_{1})}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:FluidSubtopic:Surface Tension

⏱ 2mℹ️ Source: PYQ_2020

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