19. IE ••• In older computer monitors, electrons were accelerated from rest through a potential difference in an “electron gun” arrangement (▼ Figure 16.29).

(a) Should the left side of the gun be at (1) a higher,

(2) an equal, or (3) a lower potential than the right side? Why?

(b) If the potential difference across the gun is 5.0 kV, what is the “muzzle speed” of the electrons emerging from it?

(c) If the gun is directed at a screen 25 cm away, how long do the electrons take to reach the screen?