A natural permanent magnetic field has no detectable electrical field, has no electromagnetic field (EMF) and is a pure magnetic field similar to the natural magnetic fields generated by the earth.
(A natural permanent magnetic field; has; no detectable electrical field) (A natural permanent magnetic field; has; no electromagnetic field) (A natural permanent magnetic field; is; a pure magnetic field similar to the natural magnetic fields) (the natural magnetic fields; generated; by the earth)
A natural permanent magnetic field A natural permanent magnetic field A natural permanent magnetic field the natural magnetic fields
has has is generated
no detectable electrical field
no electromagnetic field
a pure magnetic field similar to the natural magnetic fields
by the earth