Medium
In Millikan's oil drop experiment,what is the viscous force acting on an uncharged drop of radius $2.0 \times 10^{-5} \, m$ and density $1.2 \times 10^{3} \, kg/m^3$? Take the viscosity of air $= 1.8 \times 10^{-5} \, Nsm^{-2}$. (Neglect buoyancy due to air).
- A$3.8 \times 10^{-11} \, N$
- B$3.9 \times 10^{-10} \, N$
- C$1.8 \times 10^{-10} \, N$
- D$5.8 \times 10^{-10} \, N$
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View Solution$A$ viscous fluid is flowing through a cylindrical tube. The velocity distribution of the fluid is best represented by the diagram
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