The problem of determining the electric and magnetic fields in and around a conductor in a quasistatic external electric field is considered. It is shown that there are two frequency regimes corresponding to whether the ratio of the skin depth to the linear size of the conductor is large or small compared to unity. General arguments are made about the magnitudes of the fields, especially their normal and transverse components near the surface of the body. The special case of a spherical conductor is solved explicitly in order to verify the general conclusions about the nature of the fields in these two regimes. Comparison is made with behavior in an external magnetic field.
ASJC Scopus subject areas
- Physics and Astronomy(all)