Physics for Scientists and Engineers
10th Edition
ISBN: 9781337553278
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 28, Problem 19P
(a)
To determine
The observations are important or not.
(b)
To determine
The observations are important or not.
(c)
To determine
The comparison of the charge to mass ratio obtained by JJ Thomson.
(d)
To determine
Whether Thomson observe any deflection of beam due to gravitation.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
In the figure, an electron accelerated from rest through potential difference V1=1.49 kV enters the gap between two parallel plates having separation d = 17.6 mm and potential difference V2= 164 V. The lower plate is at the lower potential. Neglect fringing and assume that the electron's velocity vector is perpendicular to the electric field vector between the plates. In unit-vector notation, what uniform magnetic field allows the electron to travel in a straight line in the gap?
An electron with kinetic energy 2.5 keV moving along the positive direction of an x axis enters a region in which a uniform electric field of magnitude 10 kV/m is in the negative direction of the y axis. A uniform magnetic field is to be set up to keep the electron moving along the x axis, and the direction of is to be chosen to minimize the required magnitude of . In unit-vector notation, what should be set up?
In a cathode ray experiment, the speed of the particles was determined to be 2.0 x 107 m/s while they were travelling through a 3.5 x 10-4 T magnetic field. In order to cause the particles to travel in a straight line, an electric field, at right angles to the magnetic field, was created using parallel plates separated by 2.8 cm. What potential difference would be needed on the plates to cause the particles to travel in a straight line?
Chapter 28 Solutions
Physics for Scientists and Engineers
Ch. 28.1 - An electron moves in the plane of this paper...Ch. 28.2 - Prob. 28.2QQCh. 28.4 - A wire carries current in the plane of this paper...Ch. 28.5 - (i) Rank the magnitudes of the torques acting on...Ch. 28 - At the equator, near the surface of the Earth, the...Ch. 28 - Consider an electron near the Earths equator. In...Ch. 28 - Find the direction of the magnetic field acting on...Ch. 28 - A proton moving at 4.00 106 m/s through a...Ch. 28 - A proton travels with a speed of 5.02 106 m/s in...Ch. 28 - A laboratory electromagnet produces a magnetic...
Ch. 28 - A proton moves perpendicular to a uniform magnetic...Ch. 28 - An accelerating voltage of 2.50103 V is applied to...Ch. 28 - A proton (charge + e, mass mp), a deuteron (charge...Ch. 28 - Review. A 30.0-g metal hall having net charge Q =...Ch. 28 - Review. One electron collides elastically with a...Ch. 28 - Review. One electron collides elastically with a...Ch. 28 - Review. An electron moves in a circular path...Ch. 28 - A cyclotron designed to accelerate protons has a...Ch. 28 - Prob. 15PCh. 28 - Singly charged uranium-238 ions are accelerated...Ch. 28 - A cyclotron (Fig. 28.16) designed to accelerate...Ch. 28 - A particle in the cyclotron shown in Figure 28.16a...Ch. 28 - Prob. 19PCh. 28 - A straight wire earning a 3.00-A current is placed...Ch. 28 - A wire carries a steady current of 2.40 A. A...Ch. 28 - Why is the following situation impossible? Imagine...Ch. 28 - Review. A rod of mass 0.720 kg and radius 6.00 cm...Ch. 28 - Review. A rod of mass m and radius R rests on two...Ch. 28 - A wire having a mass per unit length of 0.500 g/cm...Ch. 28 - Consider the system pictured in Figure P28.26. A...Ch. 28 - A strong magnet is placed under a horizontal...Ch. 28 - In Figure P28.28, the cube is 40.0 cm on each...Ch. 28 - A magnetized sewing needle has a magnetic moment...Ch. 28 - A 50.0-turn circular coil of radius 5.00 cm can be...Ch. 28 - You are in charge of planning a physics magic show...Ch. 28 - You are working in your dream job: an assistant...Ch. 28 - A rectangular coil consists of N = 100 closely...Ch. 28 - A rectangular loop of wire has dimensions 0.500 m...Ch. 28 - A wire is formed into a circle having a diameter...Ch. 28 - A Hall-effect probe operates with a 120-mA...Ch. 28 - Prob. 37APCh. 28 - Figure 28.11 shows a charged particle traveling in...Ch. 28 - Within a cylindrical region of space of radius 100...Ch. 28 - Prob. 40APCh. 28 - Prob. 41APCh. 28 - (a) A proton moving with velocity v=ii experiences...Ch. 28 - A proton having an initial velocity of 20.0iMm/s...Ch. 28 - You have been called in as an expert witness in a...Ch. 28 - Prob. 45APCh. 28 - Why is the following situation impossible? Figure...Ch. 28 - A heart surgeon monitors the flow rate of blood...Ch. 28 - Review. (a) Show that a magnetic dipole in a...Ch. 28 - Consider an electron orbiting a proton and...Ch. 28 - Protons having a kinetic energy of 5.00 MeV (1 eV...Ch. 28 - Review. A wire having a linear mass density of...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- An electron of kinetic energy 2000 eV passes between parallel plates that are 1.0 an apart and kept at a potential difference of 300 V. What is the strength of the uniform magnetic field B that will allow the electron to travel undeflected through the plates? Assume E and B are perpendicular.arrow_forwardA mystery particle enters the region between the plates of a Thomson apparatus as shown in Figure 4.6. The deflection angle θ is measured to be 0.20 radians (downwards) for this particle when V = 2000 V, ℓ = 10.0 cm, and d = 2.00 cm. If a perpendicular magnetic field of magnitude 4.57 × 10−2 T is applied simultaneously with the electric field, the particle passes through the plates without deflection. (a) Find q/m for this particle. (b) Identify the particle. (c) Find the horizontal speed with which the particle entered the plates. (d) Must we use relativistic mechanics for this particle?arrow_forwardIn the figure, an electron accelerated from rest through potential difference V1=1.26 kV enters the gap between two parallel plates having separation d = 19.6 mm and potential difference V2= 52.4 V. The lower plate is at the lower potential. Neglect fringing and assume that the electron's velocity vector is perpendicular to the electric field vector between the plates. In unit-vector notation, what uniform magnetic field allows the electron to travel in a straight line in the gap? I need this in units of mT.arrow_forward
- A beam of electrons whose kinetic energy is 1.9x10 -16 J emerges from a thin foil “window” at the end of an accelerator tube. There is a metal plate adistance d = 0.48mm from this window and at right angles to the direction of the emerging beam. b) What magnitude of the magnetic field will prevent the beam from hittingthe plate?arrow_forwardan electron accelerated from rest through potential difference V1 1.00 kV enters the gap between two parallel plates having separation d =20.0 mm and potential difference V2 =100 V.The lower plate is at the lower potential. Neglect fringing and assume that the electron’s velocity vector is perpendicular to the electric field vector between the plates. In unit-vector notation, what uniform magnetic field allows the electron to travel in a straight line in the gap?arrow_forwardWhat is the speed of a beam of electrons when the simultaneous influence of an electric field of 1.56×104V/m1.56×104V/m and a magnetic field of 4.62×10−3T4.62×10−3T, with both fields normal to the beam and to each other, produces no deflection of the electrons?arrow_forward
- Consider a region where a 25 V/m electric field and a 15 mT magnetic field exist and are along the same direction. If the electron is in the said region, is moving at a direction 20 degrees counter clockwise from the direction of the magnetic field and is experiencing a total force of 5 x 10^-18 newtons determine the speed of the electron.arrow_forwardConsider an experimental setup where charged particles (electrons or protons) are first accelerated by an electric field and then injected into a region of constant magnetic field with a field strength of 0.45 T. 1. What is the potential difference, in volts, required in the first part of the experiment to accelerate electrons to a speed of 6.1 × 107 m/s? 2. Find the radius of curvature, in meters, of the path of a proton accelerated through this same potential after the proton crosses into the region with the magnetic field. 3. What is the ratio of the radii of curvature for a proton and an an electron traveling through this apparatus?arrow_forwardWhat is the velocity of a beam of electrons that goes undeflected when moving perpendicular to an electric and magnetic fields. E⃗ E→ and B⃗ B→ are also perpendicular to each other and have magnitudes 4900 V/m and 6.7×10−3 T , respectively. What is the radius of the electron orbit if the electric field is turned off?arrow_forward
- An electron in a TV CRT moves with a speed of 6.00 X 107 m/s,in a direction perpendicular to the Earth’s field, which has a strength of 5.00 X 10-5 T. If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a correction.)arrow_forwardAn electron is given a velocity of 1.2x104m/s through a magnetic field. As the electron is observed, it is seen to have a constant velocity. Explain what can be deduced about the electric field in the region the electron is traversing.arrow_forwardAn electron entering Thomson’s e/m apparatus has an initial velocity (in horizontal direction only) of 4.0 x 106 m/s. In the lab is a permanent horseshoe magnet of strength 12 mT, which you would like to use. (a) What electric fi eld will you need in order to produce zero defl ection of the electrons as they travel through the apparatus? (b) The length of nonzero E and B fi elds is 2.0 cm. When the magnetic fi eld is turned off, but the same electric field remains, how far in the vertical direction will the electron beam be deflected over this length?magnetic fi eld is turned off, but the same electric fi eld remains, how far in the vertical direction will the electron beam be defl ected over this lengtharrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Modern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning
Modern Physics
Physics
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Cengage Learning