  In this paper, we discuss dynamical instability of charged dissipative
cylinder under radial oscillations. For this purpose, we follow the Eulerian
and Lagrangian approaches to evaluate linearized perturbed equation of motion.
We formulate perturbed pressure in terms of adiabatic index by applying the
conservation of baryon numbers. A variational principle is established to
determine characteristic frequencies of oscillation which define stability
criteria for gaseous cylinder. We compute the ranges of radii as well as
adiabatic index for both charged and uncharged cases in Newtonian and
post-Newtonian limits. We conclude that dynamical instability occurs in the
presence of charge if the gaseous cylinder contracts to the radius $R_{*}$.
