4. An electron is in motion at 4.0 X 106 m/s horizontally when it enters a region of space between two parallel plates, as shown, starting at the negative plate. The electron deects downwards and strikes the bottom plate. The magnitude of the electric field between the plates is 4.0 x 102 WC and separation between the charged plates is 2.0 cm. ' . d=2.0cm 'J a. Referring to the above image, state the sign of the charge on each electric plate: i. Sign of bottom plate - ii. Sign of the top plate - b. Determine the acceleration of the electron between the plates. c. Determine the horizontal distance travelled by the electron when it hits the plate. d. Determine the velocity of the electron as it strikes the plate