An electron beam is shot into a region where there is both an electric field pointing upward of magnitude E=7.2N/C and a magnetic field B as shown in the figure. While moving through the region the electron beam stays in a straight line with speed v=140 m/s
a) in which direction does the electric force act on the electrons b) In order to keep the electrons in a straight line, in which direction should the magnetic force act c) calculate the numerical value of the magnitude of the electric force in newtons d) Calculate the magnitude of the magnetic field if the electron continues in a straight line, in tesla
