An electron with kinetic energy of 5 x 10-16 J is moving to the right along the axis of a cathode-ray tube as shown below. There is an electric field E = (4 x 104 N/C) Ĵ in the region between the deflection plates. Everywhere else, E = 0. Fluorescent screen Deflection plates -4 cm 12 cm 1) How far is the electron from the axis of the tube when it reaches the end of the plates? 5.119905 mm Submit You currently have 7 submissions for this question. Only 10 submission are allowed. You can make 3 more submissions for this question. 2) At what angle is the electron moving with respect to the axis? (Positive angle measured counterclockwise with respect to the axis) 89.95 Submit You currently have 7 submissions for this question. Only 10 submission are allowed. You can make 3 more submissions for this question. 3) At what distance from the axis will the electron strike the fluorescent screen? 89.95 cm Submit You currently have 4 submissions for this question. Only 10 submission are allowed. You can make 6 more submissions for this question. +

An electron with kinetic energy of 5 x 10-16 J is moving to the right along the axis of a cathode-ray tube as shown below. There is an electric field E = (4 x 104 N/C) Ĵ in the region between the deflection plates. Everywhere else, E = 0. Fluorescent screen Deflection plates -4 cm 12 cm 1) How far is the electron from the axis of the tube when it reaches the end of the plates? 5.119905 mm Submit You currently have 7 submissions for this question. Only 10 submission are allowed. You can make 3 more submissions for this question. 2) At what angle is the electron moving with respect to the axis? (Positive angle measured counterclockwise with respect to the axis) 89.95 Submit You currently have 7 submissions for this question. Only 10 submission are allowed. You can make 3 more submissions for this question. 3) At what distance from the axis will the electron strike the fluorescent screen? 89.95 cm Submit You currently have 4 submissions for this question. Only 10 submission are allowed. You can make 6 more submissions for this question. +

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter22: Electric Fields

Section: Chapter Questions

Problem 42AP

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Similar questions

You are working on a research project in which you must control the direction of travel of electrons using deflection plates. You have devised the apparatus shown in Figure P22.28. The plates are of length = 0.500 m and are separated by a distance d = 3.00 cm. Electrons are fired at vi = 5.00 106 m/s into a uniform electric field from the left edge of the lower, positive plate, aimed directly at the right edge of the upper, negative plate. Therefore, if there is no electric field between the plates, the electrons will follow the broken line in the figure. With an electric field existing between the plates, the electrons will follow a curved path, bending downward. You need to determine (a) the range of angles over which the electron can leave the apparatus and (b) the electric field required to give the maximum possible deviation angle. Figure P22.28
An evacuated tube uses an accelerating voltage of 40 kV to accelerate electrons to hit a copper plate and produce x rays. Non-relativistically, what would be the maximum speed of these electrons?
An electron is to be accelerated in a uniform electric field having a strength of 2.00106 V/m. (a) What energy in keV is given to the electron if it is accelerated through 0.400 m? (b) Over what distance would it have to be accelerated to increase its energy by 50.0 GeV?
You are a coach for the Physics Olympics team participating in a competition overseas. You are given the following sample problem to present to your team of students, which you need to solve very quickly: A person is standing on the midline of a soccer field. At one end of the field, as shown in Figure P24.28, is a letter D, consisting of a semicircular metallic ring of radius R and a long straight metal rod of length 2R, the diameter of the ring. The plane of the ring is perpendicular to the ground and perpendicular to the midline of the field shown by the broken line in Figure P24.28. Because of an approaching lightning storm, the semicircular ring and the rod become charged. The ring and the rod each attain a charge Q. What is the electric potential at point P, which is at a position x along the midline of the field, measured from the center of the rod, due to the letter D? Think quickly and use all resources available to you, which include your physics textbook: yon are in competition! Figure P24.28
Review. From a large distance away, a particle of mass m1, and positive charge q1 is fired at speed in the positive x direction straight toward a second particle, originally stationary but free to move, with mass m2, and positive charge q2. Both particles are constrained to move only along the x axis. (a) At the instant of closest approach, both particles will be moving at the same velocity. Find this velocity, (b) Find the distance of closest approach. After the interaction, the particles will move far apart again. At this time, find the velocity of (c) the particle of mass m1, and (d) the particle of mass m2.
Cathode ray tubes (CRTs) used in old-style televisions have been replaced by modern LCD and LED screens. Part of the CRT included a set of accelerating plates separated by a distance of about 1.50 cm. If the potential difference across the plates was 25.0 kV, find the magnitude of the electric field in the region between the plates.
Calculate the speed of (a) an electron and (b) a proton with a kinetic energy of 1.00 electron volt (eV). (c) Calculate the average translational kinetic energy in cV of a 3.00 102 K ideal gas particle. (Recall from Topic 10 that 12mv2 = 32kBT.)
In 1911, Ernest Rutherford and his assistants Geiger and Marsden conducted an experiment in which they scattered alpha particles (nuclei of helium atoms) from thin sheets of gold. An alpha particle, having charge +2e and mass 6.64 10-27 kg, is a product of certain radioactive decay's. The results of the experiment led Rutherford to the idea that most of an atoms mass is in a very small nucleus, with electrons in orbit around it. (This is the planetary model of the atom, which well study in Chapter 42.) Assume an alpha particle, initially very far from a stationary gold nucleus, is fired with a velocity of 2.00 107 m/s directly toward the nucleus (charge +79e). What is the smallest distance between the alpha particle and the nucleus before the alpha particle reverses direction? Assume the gold nucleus remains stationary.
Review Suppose you want to use a small, positively charged ball suspended by a light thread to map out the electric field in the space around a charged source. Describe the reaction of the ball as you place it at the two locations in front of the infinitely large, positively charged sheet shown in Figure P31.2A. Be sure to relate your description to what you know about the sheets electric field.
A microscopic spherical dust particle of radius 2m and mass 10g is moving in outer space at a constant speed of 30 cm/sec. A wave of light strikes it from the opposite direction of its motion and gets absorbed. Assuming the particle decelerates uniformly to zero speed in one second, what is the average electric field amplitude in the light?
An electron is to be accelerated in a uniform electric field having a strength of 2.00106 V/m. (a) What energy in keV is given to the electron if it is accelerated through 0.400 m? (b) Over what distance would it have to be accelerated to increase its energy by 50.0 GeV?
The radius of circular electron orbits in the Bohr model of the hydrogen atom are given by (5.29 1011 m)n2, where n is the electron's energy level (Fig. P6.79). The speed of the electron in each energy level is (c/137n), where c = 3 108 m/s is the speed of light in vacuum, a. What is the centripetal acceleration of an electron in the ground state (n = 1) of the Bohr hydrogen atom? b. What are the magnitude and direction of the centripetal force acting on an electron in the ground state? c. What are the magnitude and direction of the centripetal force acting on an electron in the n = 2 excited state?