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Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityEasy2 minPYQ_2020

PhysicsEasysingle choice

Two raindrops reach the earth with their terminal velocities in the ratio $4 : 9$ . The ratio of their radii is

Options:

Answer:

Solution:

Terminal speed is $v = \frac{2 r_{}^{2} g}{9 η} (σ - ρ)$

therefore $v \propto r^{2}$

$\frac{r_{1}}{r_{2}} = \sqrt{\frac{v_{1}}{v_{2}}}$

$\frac{r_{1}}{r_{2}} = \sqrt{\frac{4}{9}}$

$\frac{r_{1}}{r_{2}} = \frac{2}{3}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: PYQ_2020

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