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Physics - Fluid Question with Solution | TestHub

PhysicsFluidSurface TensionEasy2 minPYQ_2020

PhysicsEasysingle choice

A metallic wire of density $ρ$ floats horizontally in the water. The maximum radius of the wire so that the wire may not sink will be (surface tension of water $= T$ and angle of contact $θ = 0 °$ )

Options:

Answer:

Solution:

$2 T l \cos θ = m g$

$2 T l \cos θ = π r^{2} l ρ g$

For maximum radius, $\cos θ = 1$

$∴ r = \sqrt{\frac{2 T}{π ρ g}}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:FluidSubtopic:Surface Tension

⏱ 2mℹ️ Source: PYQ_2020

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