A monoenergetic (18 keV) electron beam initially in the horizontal direction is subjected to a horizontal magnetic field of 0.04 G normal to the initial direction. Estimate the up or down deflection of the beam over a distance of 30 cm (me = 9.11×10-31 kg).

Protons having a kinetic energy of 4.66 MeV (1 ev = 1.60 x 1019 )) are moving in the positive x direction and enter a magnetic field B - 0.049 2k T directed out of the plane of the page and extending from x = O to x - 1.00 m as shown in the figure below. x= 1.00 m (a) Ignoring relativistic effects, find the angle a between the initial velocity vector of the proton beam and the velocity vector after the beam emerges from the field. (b) Calculate the y component of the protons' momenta as they leave the magnetic field. kg • m/s

A beam of protons is directed in a straight line along the positive z-direction through a region of space in which there are crossed electric and magnetic fields. If the electric field magnitude is E = 390 V/m in the negative y-direction and the protons move at a constant speed of v= 5.7 x 10 m/s, what must the direction and magnitude of the magnetic field be in order for the beam of protons to continue undeflected along its straight-line trajectory? Select the direction of the magnetic field B. negative z-direction positive x-direction negative x-direction positive z-direction positive y-direction negative y-direction magnitude of the magnetic field B: > TOOLS T

A proton moves from rest in the +z direction after being accelerated by the potential difference V. The proton then passes undeflected through a region with a uniform electric field E in the +x direction and a uniform magnetic field B in the +y direction. If the experiment is repeated using a potential difference of 2V so that the proton is accelerated more, how would the proton move? (A) deviates in the y direction. B) It deviates in the +y direction. c) It deviates in the +x direction. D It deviates in the-x direction.