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 3.45 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 832 kg/m3 for which its weight could be balanced by the electric force of this field on one electron. Oil droplets Pinhole Telescope with scale in eyepiece Light um

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 3.45 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 832 kg/m3 for which its weight could be balanced by the electric force of this field on one electron. Oil droplets Pinhole Telescope with scale in eyepiece Light um

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.
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)?
During Millikan's oil droplet experiment, a charged droplet of oil is suspended in the air between two charged plates as shown. If over time, the oil that makes up this drop begins to evaporate, causing the drop's mass to decrease, but not affecting the drop's charge, the drop will: spin in circles remain stationary fall rise
Two neutral, square, thin copper plates (15 cm per side) are situated parallel to each other and located 6 mm apart. A 9V battery is connected to the plates, such that the anode is connected to one plate and the cathode to the other plate, and the battery and plates reach a new electrostatic equilibrium. What is the magnitude and direction of the electric field between the two plates? Two neutral, square, thin copper plates (15 cm per side) are situated parallel to each other and located 6 mm apart. A 9V potential difference is applied across the two plates. What is the electric potential at a distance of 2 mm away from the negatively charged plate (define the negative plate to be at zero potential)?
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
P ○ 35° Electron O9.18 x 10¹⁹ T. out of the page 1.53 x 10-3 T, out of the page 1.60 x 10-8 T, into the page 2.18 x 10-3 T, out of the page 1.31 x 10-8 T, into the page 1.53 x 10-3 T, into the page 9.18 x 109 T, into the page 2.18 x 10-³ T, into the page 1.60 x 10-8 T, out of the page ○ 1.31 x 10-8 T, out of the page X An electron moves at 3.60 x 10 m/s as shown in the figure. Find the magnitude and direction of the magnetic field this electron produces at point P which is 6.00 um away from the electron. (e = 1.60 x 10 19 c)
On which level within this parallel status would an electron have the most potential energy? (the choices are in the photos)
You have a sample of lithium metal that is electrically neutral. What is the approximate ratio of the mass of each positively charged particle in your lithium sample to each negatively charged particle in your lithium sample? O About 3:1 O About 14000:1 O About 7:1 O About 1000:1 O About 1.0e19:1 O About 1:1
A simple and common technique for accelerating electrons is shown in the figure, which depicts a uniform electric field between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to pass through. Randomized Variables E = 2.7 × 104 N/C Calculate the horizontal component of the electron's acceleration if the field strength is 2.7 × 104 N/C. Express your answer in meters per second squared, and assume the electric field is pointing in the negative x-direction as shown in the figure.
Coulomb’s law tells us that the electrostatic force between two charged objects can be calculated by: ?= ??1?2/?^2Where k is a constant with a value of 8.99x109 Nm2/C2; ?1 and ?2 are the charges of the two particles (1.602x10-19 C), and r is the distance between the two particles. The force is attractive if the charges of the two particles is opposite (one’s positive and one’s negative) and repulsive if the charges have the same charge (both positive or both negative). Calculate the electrostatic force on proton #1 from the other two protons.Will the gravitational force between the protons be attractive or repulsive? What about the electrostatic force? Which has the larger magnitude, the electrostatic force or the gravitational force? Can the electrostatic and gravitational forces alone create a stable Lithium nucleus?
#3. In Millikan oil drop experiment, a negatively charged oil droplet of mass 3 x 10-12 g and charge 1.6 x 10-16C is kept suspended within the chamber. (a) Sketch a diagram to show the electric field and different forces working on the oil droplet. (b) Calculate the minimum electric field required in order to keep it suspended inside the chamber. (c) What is the electric field required to move the charge vertically downward at an acceleration of 5 cm/s2 ?
A uniform electric field is created by two horizontal parallel plate electrodes of length 10 cm separated by a vertical distance d = 5 cm and held at a potential difference V = 250V. A beam of electrons is introduced between the two plates with a horizontal velocity v = 5 x 106 m/s. What is the deflection distance towards the positive plate when the electron beam leaves the electric field? Select one: a. 5.0 cm b. 3.5 cm c. 1.76 cm d. 8.8 mm