ELECTROMAGNETIC FIELDS OF CURRENT-CARRYING WIRES IN A CONDUCTING MEDIUM

The fields of a finite wire carrying a harmonically time varying current are calculated for the case of the wire contained in an infinite conducting medium. The insulation of current-carrying wires in a conducting medium is discussed. It is concluded that the insulation characteristics need not usually be considered.The fields of a finite current-carrying vertical wire within a horizontal slab are calculated. The mutual impedance between two finite circuits, one being vertical and within the slab and one horizontal and on the surface of the slab, is calculated for limiting values of the lower medium conductivity. The results are thought to be applicable to electrical methods of well logging in geophysical exploration.