To determine the Electric Field (E) value at distances from a single charge, the formula E = Kq/r^2 is applicable, where K is Coulomb's Constant. For a charged plate, the surface area does influence the electric field, especially when considering it as a capacitor with positive and negative plates. The electric field between two plates can be calculated, and the electrostatic force on a charge placed between them can be found using F = k(q1)(q2)/r^2, where q1 is the plate charge and q2 is the individual charge. Understanding these equations is crucial for solving problems related to electric fields and forces in electrostatics. The discussion emphasizes the importance of these formulas in analyzing electric fields from both point charges and charged plates.
