A beam of electrons whose kinetic energy is K emerges from a thin-foil "window" at the endof an accelerator tube. A metal plate at distance d from this window is perpendicular to thedirection of the emerging beam, as shown in Fig. 1.(a) Show that we can prevent the beam from hitting the plate if we apply a uniform magnetic2mKfield such thatin which m and e are the electron mass and charge.(b) How should B be oriented?FoilwindowElectronbeamPlateTubed-Fig. 1

Answered: Image /qna-images/answer/2159f888-3583-4541-b880-e7920036221f.jpg

Answered: A beam of electrons whose kinetic…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 63AP: An electron of kinetic energy 2000 eV passes between parallel plates that are 1.0 an apart and kept...

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A proton precesses with a frequency p in the presence of a magnetic field. If the intensity of the magnetic field is doubled, what happens to the precessional frequency?
Repeat the previous problem, but with the loop lying flat on the ground with its current circulating counterclockwise (when viewed from above) in a location where Earth’s field is north, but at an angle 45.0° below the horizontal and with a strength of 6.0105T.
Check Your Understanding A cyclotron is to be designed to accelerate protons to kinetic energies of 20 Mev using a magnetic field of 2.0 T. What is the required radius of the cyclotron?
Solve the following: A proton (of mass, m=1.67 x 10-27kg) starts moving in a circular path of radius 4 cm when it enters perpendicular to the Earth's magnetic field of 4 x 10-5 T. B in Calculate the speed of the cosmic ray proton in (m/s) ?
A 0.263 kg ball, containing a net charge of -159.35 mC, is thrown horizontally into a region of uniform magnetic field of field strength 10 Tesla. The ball is traveling perpendicular to the B-field at the instant it is thrown, and at that moment, it is known to be traveling at v=20 km/s. Say, the B-field is applied *into the plane of the paper/screen. How far (in meters) will the ball deflect from its initial horizontal path, due to the action of the B-field along, after it has traveled D=2491 meters horizontally while being deflected along its path. NOTE: if you end up getting 2 possible correct answers, enter the value that is LESS than "D". Both answers, however, are correct. It will be worthwhile to think about the meaning of the solution that is MORE than "D" Deflection (say, y) = 1
A particle of mass “M” and charge “+Q” Travels at a velocity “V” in a plane perpendicular to a Magnetic Field of magnitude “B” as shown in the Picture. The particle will experience motion on a circular path. (not the question just context, also the pic is for probelm 1.) Assume similar conditions as problem 1 but now the proton, moves along the magnetic field undeflected. This new behavior can only be explained if there exist an external electric field in addition to the magnetic field. What is the magnitude and direction of such field? (you can disregard gravity) (prob 2 is the question:) sorry if its confusing)
The uniform magnetic field present in the region is given as B = 4.45 ax + Byay, measured in milliteslas. Find the radius of curvature, in nanometers, if, at one instant, the velocity vector of the electron in the magnetic field is v = 9.74 ax - 4.06 ay, measured in meters per second, then it moves in a stationary circular path due to the magnetic field. Answer in 4 decimal places.
A uniform magnetic field of magnitude 0.20 T is directed along the positive x axis. A positron moving at 1.00x107 m/s enters the field along a direction that makes an angle of 80.0° with the x axis. The motion of the particle is expected[o be a helix What is the pitch of the trajectory in mm? (m,-9.11x10-3! kg, q=1.6x10-19 C) 0,20 T büyüklüğündeki düzgün manyetik alan pozitifx ekseni yönündedir. Sürati 1,00x10" m/s olan bir pozitron x ekseni ile 80,0° açı yapacak şekilde alana girdiğinde helis şeklinde bir yörünge çizmesi beklenir. Bu helisin hatvesi (adımı) mm cinsinden nedir? (m,=9,11x10-31 kg, q=l,6x10-19 C)
In a 1.25 T magnetic field directed vertically upward, a particlehaving a charge of magnitude 8.50 mC and initially moving northwardat 4.75 km/s is deflected toward the east. (a) What is the sign of thecharge of this particle? Make a sketch to illustrate how you found youranswer. (b) Find the magnetic force on the particle.
A cyclotron used to accelerate protons has a uniform magnetic field of 0.45 T. If the inner radius of the dees is 39.0 cm, what is the maximum kinetic energy (in MeV) attainable by the protons? (Include 2 digit after the decimal point and maximum of 5% of error is accepted in your answer. Take elementary charge 1.6 x 10 -19 C, mass of proton 1.67 x 10 -27 kg and 1 eV=1.6 x 10-19 J.)
A beam of electrons travelling with speed 1.2 × 107ms-1 in an evacuated tube is made to move in a circular path of radius 0.048m by a uniform magnetic field of flux density B = 1.4mT.(a.) Calculate, in electronvolts, the kinetic energy of an electron in the beam. Deduce the PD through which the electron was accelerated.(b.) A similar technique is used to accelerate protons to very high speeds. Protons with energies of 500GeV can be held by magnetic fields in circular orbits of radius 2 km.Suggest why such a large radius orbit is necessary for high energy protons.
A beam of protons is directed in a straight line along the +z direction through a region of space in which there are crossed electric and magnetic fields. The electric field is 450 V/m in the -y direction and the protons move at a constant speed of 10^5 m/s. 1)What must be the magnitude of the magnetic field such that the beam of protons continues along its straight-line trajectory? (Express your answer using two significant figures.)

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