(a) What is the speed of a beam of electrons when the simultaneous influence of an electric field of 1.56 X 10 V/m and a magnetic field of 4.62 X 10-3 T, with both fields normal to the beam and to each other, produces no deflection of the electrons?
(b) In a diagram, show the relative orientation of the vectors v, E, and B.
(c) When the electric field is removed, what is the radius of the electron orbit? What is the period of the orbit?