  In this paper, we studied the behavior of relativistic objects with
anisotropic matter distribution considering Tolman IV form for the
gravitational potential Z. The equation of state presents a quadratic relation
between the energy density and the radial pressure. New exact solutions of the
Einstein-Maxwell system are generated. A physical analysis of electromagnetic
field indicates that is regular in the origin and well behaved. We show as the
presence of an electrical field modifies the energy density, the radial
pressure and the mass of the stellar object and generates a singular charge
density.

General Physics