In Millikan's oil drop experiment, what is viscous force acting on an uncharged drop of radius 2.0 $\times$ 10$-$5 m and density 1.2 $\times$ 103 kgm$-$3 ? Take viscosity of liquid = 1.8 $\times$ 10$-$5 Nsm$-$2. (Neglect buoyancy due to air).

Question

In Millikan's oil drop experiment, what is viscous force acting on an uncharged drop of radius 2.0 $\times$ 10^$-$5 m and density 1.2 $\times$ 10³ kgm^$-$3 ? Take viscosity of liquid = 1.8 $\times$ 10^$-$5 Nsm^$-$2. (Neglect buoyancy due to air).

3.8 $\times$ 10^$-$11 N

3.9 $\times$ 10^$-$10 N

1.8 $\times$ 10^$-$10 N

5.8 $\times$ 10^$-$10 N

Solution

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