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Physics - Fluid Question with Solution | TestHub

PhysicsFluidSurface TensionEasy2 minPYQ_2024

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A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface tension of water is $0.07 N m^{- 1}$ , then the excess force required to take it away from the surface isNEET 2024

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Answer:

Solution:

$Excess force = T \times 2 π R = \frac{7}{100} \times 2 \times 3.14 \times \frac{4.5}{100} = 197.82 \times 1 0^{- 4} = 19.8 \times 1 0^{- 3} N = 19.8 mN$

Stream:NEETSubject:PhysicsTopic:FluidSubtopic:Surface Tension

⏱ 2mℹ️ Source: PYQ_2024

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