Two 2.5-cm-diameter disks face each other, 2.0 mm apart.

Last updated: 7/31/2022

Two 2.5-cm-diameter disks face each other, 2.0 mm apart. They are charged to ± 15 nC. What is the electric field strength between the disks? A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?