Figure 22-40 shows a proton(p) on the central axis through a diskwith a uniform charge density due toexcess electrons.The disk is seen froman edge-on view. Three of those electronsare shown: electron ec at thedisk center and electrons es at oppositesides of the disk, at radius R fromthe center. The proton is initially atdistance z ! R ! 2.00 cm from the disk. At that location, what arethe magnitudes of (a) the electric field due to electron ec and (b)the net electric field E due to electrons es? The proton is thenmoved to z ! R/10.0. What then are the magnitudes of(c) at the proton’s location? (e) From (a) and (c)we see that as the proton gets nearer to the disk, the magnitude ofEc: and (d) E:s,netincreases, as expected.Why does themagnitude of from the two sideelectrons decrease, as we see from(b) and (d)?