Page:Elementary lectures on electric discharges, waves and impulses, and other transients (Steinmetz 1911).djvu/24

 energy. Thus in electric circuits containing energy stored in the magnetic and in the dielectric field, the change of the amount of stored energy&#8239;—&#8239;decrease or increase&#8239;—&#8239;frequently occurs by a series of successive changes from magnetic to dielectric and back again from dielectric to magnetic stored energy. This for instance is the case in the charge or discharge of a condenser through an inductive circuit.