Polarities of several ultra-low-electromagnetic-wave modes propagating in a
magnetoplasma-filled cylindrical waveguide under typical conditions I e st
udied. Analytical and numerical results show that the polarity of a wave mo
de determined using a conventional propagation factor is reasonable only in
some limited parameter regions, and thus must be analyzed using rotational
direction of the resultant transverse components of an electromagnetic-wav
e electric field along the force line of an external magnetic field. EHp mo
des appearing in the range of omega (pe) > omega are physical dominant righ
t-hand polarized modes.