Physics · Fluid Mechanics
In Millikan's oil drop experiment, what is the viscous force acting on an uncharged drop of radius 2.0 × 10-5 m and density 1.2 × 103 kg m-3 at terminal velocity? Take viscosity of air = 1.8 × 10-5 N s m-2 and g = 9.8 m/s2. (Neglect buoyancy due to air).
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13.8 × 10-11 N
- 21.8 × 10-10 N
- 33.9 × 10-10 N✓
- 45.8 × 10-10 N
Correct answer
3.9 × 10-10 N
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