The scattering current induced on a thin, finite, conducting cylinder immersed in a 'theta' polarized E-field is studied. Particular attention is paid to the circumferentially non-uniform mode. This non-uniformity is shown significant (peak-to-average ratio of 3 dB at cylinder mid-length) for wavelength long cylinders with diameters as small as 0.067 lambda. Also investigated is the relationship between scattering current and cavity response patterns for narrow, thin-walled cylindrical cavities with small holes through which energy is coupled. It is demonstrated theoretically, with experimental verification, that the circumferential variation of scattering current strongly affects the fields within thin cylindrical cavities having apertures with small circumferential extents. It is noted, however, that for most thin-body radiation and scattering problems (in contrast with aperture coupling) only the uniform current mode is significant. (Author)