At each conversion point, energy is lost, primarily in the form of wasted heat from changing electrical and magnetic fields in the copper (coil), iron (core), tank, and supporting structure.
(energy; is lost; from changing electrical and magnetic fields in the copper (coil), iron (core), tank, and supporting structure; T:At each conversion point)
energy
is lost
from changing electrical and magnetic fields in the copper (coil), iron (core), tank, and supporting structure T:At each conversion point