45. The figure shows a velocity selector that can be used to measure the speed of a charged particle. Abeam of particles is directed along the axis of the instrument. A parallel plate capacitor sets up anelectric feld E, which is oriented perpendicular to a uniform magnetic field B. If the plates areseparated by 2.0 mm and the value of the magnetic field is 0.60 T, what voltage between the plateswill allow particles of speed 5.0 x 105 m/s to pass straight through without deflection?