Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityMedium2 minQB

PhysicsMediummultiple choice

Consider a situation in which there is a Newtonian fluid between two long coaxial uniformly moving cylinders of radius R and 2R.

Options:(select one or more)

Answer:

B,C

Solution:

$\frac{F}{2 π x ℓ} \frac{F}{2 π ℓ} \int_{R}^{2 R} \frac{d x}{x} \frac{F}{2 π ℓ} \times ln 2 \frac{F}{ℓ} \frac{F}{2 π ℓ} \times ln (\frac{x}{R}) \Rightarrow \frac{3}{ln 2} ln (\frac{x}{R}) \Rightarrow ln (\frac{x}{R}) \Rightarrow x = η \frac{d v}{d x} = η \int_{- v_{0}}^{2 v_{0}} d v = η \times 3 v_{0} = \frac{6 π v _{0} η}{ln 2} = η v_{0} = 1 = ln 2^{\frac{1}{3}} = 2^{\frac{1}{3}} R$

Stream:JEESubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: QB

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