.9 1LW In Fig. 28-32, an electron accelerated from rest through po- tential difference V, = 1.00 kV enters the gap between two paral- lel plates having separation d = 20.0 mm and potential difference Figure 28-32 Problem 9. V2 = 100 V. The lower plate is at the lower potential. Neglect fring- ing and assume that the electron's velocity vector is perpendicular to the electric field vector between the plates. In unit-vector nota- tion, what uniform magnetic field allows the electron to travel in a straight line in the gap? 9) For problem 9 of the text, calculate the magnetic field in milliteslas using a value of V2 = 235.6 V. 5 sig. figs