A charged oil droplet falls 5.0 mm in 20.0 s at terminal speed in the absence of
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A charged oil droplet falls 5.0 mm in 20.0 s at terminal speed in the absence of an electric field. The specific gravity of air is 1.35 x10-3 and that of oil is 0.75. The viscosity of air is 1.80 x10-5 N . s/m2.
(a) What are the mass and radius of the drop?
(b) If the droplet carries two units of electric charge and is in an electric field of 2.5 x 105 V/m, what is the ratio of the electric force to the gravitational force on the droplet?
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a b At terminal speed mg bv where m 4...View the full answer
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