An electron is moving with a speed v in the plane of the page (Figure 21.82), and there is a uniform magnetic field B into the page throughout this region; the magnetic field is produced by some large...

An electron is moving with a speed v in the plane of the page (Figure 21.82), and there is a uniform magnetic field B into the page throughout this region; the magnetic field is produced by some large coils that are not shown. Draw the trajectory of the electron, and explain qualitatively.