Electric Field Magnitude of a Disk
A uniformly charged plastic disk has a radius of 0.220 m. At what distance from the center along the central perpendicular axis is the magnitude of the electric field equal to onehalf the magnitude of the field at the center of the surface of the disk?
I don't know how to find the magnitude at the center; all I know is that somewhere in this problem requires integration. Help will be greatly appreciated.
