  Some known solutions for static charged fluid spheres of Tolman-VI type in
general relativity are reexamined. The gravitational mass that appears in the
Pant and Sah \cite{pan79} and Tikekar \cite{tik84} solutions is shown to be of
electromagnetic origin in the sense that the gravitational mass, along with all
other physical quantities, depends on the electromagnetic field alone. The
energy condition, singularity and stability problems of the models are
discussed thoroughly.
