Voltage at region is V= 20,000 V. What is the voltage expressed in J/C? The kinetic energy that each electron acquires is U=QV which is also 1 V/m = 1 J/C. What is the electric field of this configuration in both units? And that electric charge -Q feels potential energy in that electric field of U. From that relationship, what is that energy in Joules? If the distance between the plates had been twice as big, what would the energy be?
