K Question 9 of 21 An electron is in a region of space containing a uniform 2.81 x 10- T magnetic field. The electron's speed is 117 m/s and it Etravels perpendicularly to the field. Under these conditions, the electron undergoes circular motion. Macmillan Leam What is the radius r of the electron's path? m What is the frequency f of the electron's motion? f - Hz hp insert prt sc delete 144 home