A spherical cavity of radius 4.00 is at the center of a metalsphere of radius 18.5 . A point charge 6.00 rests at the very center of the cavity, whereas the metal conductor carries no netcharg Determine the electric field at a point 2.00 from the center of the cavity.
Determine the electric field at a point 7.00 from the center of the cavity.
Determine the electric field at a point 20.0 from the center