In the Millikan oil-drop experiment illustrated in the figure below, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates. Some of the droplets pick up one or more excess electrons. The charge on the plates is adjusted so that the electric force on the excess electrons exactly balances the weight of the droplet. The idea is to look fo a droplet that has the smallest electric force and assume it has only one excess electron. Suppose we are using an electric field of 4.10 x 104 N/C. The charge on one electron is 1.60 x 10-19 C. Calculate the radius of an oil drop of density 786 kg/m3 for which its weight could be balanced by the electric force of this field on one electron. Oil droplets Pinhole
In the Millikan oil-drop experiment illustrated in the figure below, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates. Some of the droplets pick up one or more excess electrons. The charge on the plates is adjusted so that the electric force on the excess electrons exactly balances the weight of the droplet. The idea is to look fo a droplet that has the smallest electric force and assume it has only one excess electron. Suppose we are using an electric field of 4.10 x 104 N/C. The charge on one electron is 1.60 x 10-19 C. Calculate the radius of an oil drop of density 786 kg/m3 for which its weight could be balanced by the electric force of this field on one electron. Oil droplets Pinhole
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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
Transcribed Image Text:In the Millikan oil-drop experiment illustrated in the figure below, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates.
Some of the droplets pick up one or more excess electrons. The charge on the plates is adjusted so that the electric force on the excess electrons exactly balances the weight of the droplet. The idea is to look for
a droplet that has the smallest electric force and assume it has only one excess electron. Suppose we are using an electric field of 4.10 x 104 N/C. The charge on one electron is 1.60 x 10-19 C. Calculate the
radius of an oil drop of density 786 kg/m³ for which its weight could be balanced by the electric force of this field on one electron.
Oil droplets
um
Telescope with
scale in eyepiece
Pinhole
Light
O
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