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 fora 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 theradius 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 dropletsumTelescope withscale in eyepiecePinholeLightO

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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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Robert Millikan was an American physicist who in 1909 performed a classic experiment involving charged oil drops. Millikan adjusted the voltage applied between two metal plates in order to suspend charged drops in the resulting electric field. For a suspended drop, the electrostatic force directed up exactly balances out the weight of the drop. Millikan ultimately determined the charge on an electron and that charge is quantized. This means that charge comes in increments, discrete amounts, rather than any amount.A NEGATIVELY-charged oil drop is suspended between two plates of opposite charge by an electric field of 603 newtons per coulomb. The drop is determined to have a mass of 8.86 x 10-17 kilograms.a. What is the charge on the drop? Include units in your answer. More information.b. How many excess electrons does it carry? Hint: Charge is quantized, so this answer must be just an integer.
In Millikan's experiment in the figure below, an oil droplet of mass 3.71 fg has an excess charge of five electrons. An electric field has been applied, and the droplet is levitating. What is the magnitude of the electric field? (Units: N/C)
A student is able to isolate a single charged oil drop while performing a Millikan oildrop experiment in the physics laboratory. The oil drop, of mass 1.23 x 10-15 kg, is suspended betweentwo horizontal parallel plates spaced 8.0 mm apart when a voltage of 120 V is applied to the platessuch that the lower plate is negative and the upper plate is positive. Does the oil drop have an excess or deficit of electrons? Explain Determine the actual number of excess or deficit electrons on the oil drop What would be the acceleration of the oil drop if the voltage across the plates were tobe increased to 300 V? What would be the acceleration of the oil drop if the voltage across the plates were set to0 V (in other words, the plates are turned off)?
In a Millikan oil-drop experiment, a particular oil drop weighs 4.37×10^−14 N. The parallel plates are separated by a distance of 1.80 cm.When the potential difference between the plates is 546 V, the drop is suspended. a. What is the net charge on the oil drop? b. If the upper plate is positive, how many excess electrons are on the oil drop?
If one of the droplets in the famous oil drop experiment has a charge of - 9.6 * 10 ^ - 19 * C how many excess electrons does the drop contain?
Calculate the theoretical value of e/m using the known values of the electric charge and electron mass (both of which you can look up in a textbook).
In a Millikan experiment, two horizontal parallel plates are 3.5 cm apart. A sphere A whose mass is equal to 4.2 x 10^-17 kg remains in suspension, while the potential difference between the plates is 5.00 V and the upper plate is positive.a. Determine the charge on the sphere.b. What is the magnitude of the sphere's excess or deficiency of electrons?
Coulomb's Law yields an expression for the energy of interaction for a pair of point charges. V = 2.31x10^-19 Q1Q2 r V is the energy (in J) required to bring the two charges from infinite distance separation to distance r (in nm).Q1 and Q2 are the charges in terms of electrons.(i.e. the constant in the above expression is 2.31×10-19 J nm electrons-2) For a group of "point" charges (e.g. ions) the total energy of interaction is the sum of the interaction energies for the individual pairs.Calculate the energy of interaction for the square arrangement of ions shown in the diagram below. d = 0.545 nm
Solve the following questions In a Milkman oil drop experiment, an oil drop of mass 4.90×10−15 kg is balanced and held stationary by electric field between two parallel plates. If the potential difference between two plates is 750 V and spacing between them is 5.0 mm, calculate the charge on droplet. Assuming g= 9.8 m/s2. How much energy is needed to move electron through a potential difference of 1.0×102 volts? In an electric field, 6.0 joules of work are done to move 2.0 coulombs of charge from point A to point B. Calculate the potential difference between points A and B. A helium ion with a charge of +2e is accelerated by a potential difference of 5.0 ×103 volts. What is the kinetic energy acquired by the ion?
Determine the distance between the electron and proton in an atom if the potential energy U of the electron is 13.8 ev (electronvolt, 1 eV = 1.6 × 10-19 J). Give your answer in Angstrom (1 A = 10-10 m). Answer: Choose... + Previous page
An Electron Evaporator. Electron beams are sometimes used to melt and evaporate metals in order to deposit thin metallic films on surfaces (similar to gold plating). One method is to put the material to be evaporated (called the "target") into a small tungsten cup (a crucible that has a very high melting point) and direct a beam of electrons at the target. Your team has been given the task of designing an electron-beam evaporator. The crucible is a cylinder, 2.0 cm in diameter and 1.5 cm in height, and contains a small target of pure nickel (Ni). The electrons are accelerated through a potential difference of V = 1.00 kV, and form a beam that originates below the crucible, exactly D = 3.90 cm off its center, in the +x direction (see the drawing). Field region D Electron beam ₁ (a) What is the speed of the electrons in the beam? (b) You must steer the electron beam with a magnetic field so that it curls over the lip of the cup and strikes the nickel target. Assuming that a uniform field…
Determine the distance between the electron and proton in an atom if the potential energy U of the electron is 13.8 ev (electronvolt, 1 eV -19 1.6 x 10 J). Give your answer in Angstrom (1 A = 10"1º m). Answer: Choose... + Next page