Abstract
Electromagnetic shielding by a spherical shell having a hole is studied relying on the relaxation technique. Unlike the former paper (RIKITAKE, 1992a), the time-dependent magnetic field given to the shell is perpendicular to the direction connecting the shell center to the hole center. Only the shells which are perfectly conducting are studied. The shielding power becomes somewhat smaller than that of an external magnetic field which is parallel to the direction connecting the shell center to the hole center, as studied in the former paper. Similar study of electromagnetic shielding for thin cylindrical shells having a defect is also made in Appendix.
