1. The problem statement, all variables and given/known data A 10keV electron moving horizontally enters a region of space in which there is directed downward an electric field of magnitude 100V/cm. (a) what are the magnitude and direction of the smallest magnetic field that will allow the electron to continue to move horizontally? Ignore the gravitational force. (b) If the electric field is produced by a capacitor whose plates are 2.50m apart, describe the trajectory of the electron if the electric field is turned off when the electron enters the field (i.e. just the magnetic field is left on.) 2. Relevant equations E/B = V/Bd 3. The attempt at a solution if i'm trying to find B,i can find the voltage by converting the 10keV and E is given also, but what is d?