  In this paper, we found new exact solutions to the Einstein- Maxwell system
of equations within the framework of MIT Bag Model considering a particular
form for the measure of anisotropy and a gravitational potential which depends
on an adjustable parameter {\alpha}. Variables as the energy density, radial
pressure, tangential pressure, electric field intensity and the metric
functions are written in terms of elementary and polinominal functions. We show
that the form chosen for the gravitational potential and the anisotropy allows
obtain physically acceptable solutions with any value of the adjustable
parameter.
