Electrostatic painting systems use electric fields to guide paint in the right direction. Just as magnets produce magnetic fields, electric charges create electric fields—these two types of fields aren’t the same, but they behave in many similar ways. Electric fields move objects without touching them, extend in all directions from the charges that produce them, and can be modeled with field lines, just like magnetic fields. Both electric fields and magnetic fields can produce attractive forces and repulsive forces. Electric charges can be positive or negative. If two charges are the same—both positive or both negative— the force between them is repulsive. If one charge is negative and one is positive, the force between them is attractive.