In Millikan's Oil Drop Experiment,if the Electric Field Between the Plates

question 51

Multiple Choice

In Millikan's oil drop experiment,if the electric field between the plates was of just the right magnitude,it would exactly balance the weight of the drop.Suppose a tiny spherical oil droplet of radius 1.3 × 10−⁴ cm carries a charge equivalent to one electron.What electric field is required to balance the weight? (The density of oil is 0.85 g/cm³,e = 1.6 × 10−¹⁹ C. )
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• A) 38.3 × 10⁵ N/C
• B) 0.6 × 10⁵ N/C
• C) 0 × 10⁵ N/C
• D) 4.8 × 10⁵ N/C
• E) 129.4 × 10⁵ N/C

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