When a direct electrical current is applied to a wire the current flow builds an electromagnetic field around the wire.
(a direct electrical current; is applied; to a wire) (the current flow; builds; an electromagnetic field; L:around the wire; T:When a direct electrical current is applied to a wire)
a direct electrical current the current flow
is applied builds
to a wire
an electromagnetic field L:around the wire T:When a direct electrical current is applied to a wire