College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 24

Protons having a kinetic energy of 5.00 MeV are moving in the positive x -direction and enter a magnetic field of 0.050 0 T in the z -direction, out of the plane of the page, and extending from x = 0 to x = 1.00 m as in Figure P19.73. (a) Calculate the y -component of the protons' momentum as they leave the magnetic field. (b) Find the angle a between the initial velocity vector of the proton beam and the velocity vector after the beam emerges from the field. Hint: Neglect relativistic effects and note that 1 eV = 1.60 × 10 19 J.