This paper presents a magneto-dynamic finite element formulation coupled wi
th circuit equations using the time-integrated electric potential. This for
mulation in high frequency, including displacement currents, permits the st
udy of electric-magnetic interactions in electric coils. The massive conduc
tors in which eddy currents can develop are considered. This formulation ca
n resolve the parasitic capacitive effect problems in massive components fo
r an axi-symmetrical domain.