  We found new class of solutions to the Einstein-Maxwell system of equations
for charged quark matter within the framework of MIT Bag Model considering a
gravitational potential Z(x) proposed by Thirukkanesh and Ragel (2013), which
depends on an adjustable parameter n. Variables as the energy density, charge
density, pressure and the metric functions are written in terms of elementary
and polinominal functions. We show that the form chosen for the gravitational
potential allows obtain physically acceptable solutions with any value of the
adjustable parameter.
