22. A group of force lines going from the north pole to the south pole of a magnet is called the magnetic ___.
24. When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage will _____.
25. ___ is the ability of a material to remain magnetized after removal of the magnetizing force.
26.
Ferromagnetic materials have minute magnetic ___ created within their atomic structure by the orbital motion and spin of electrons.
27. The ___ is an electromagnetic device that contains a coil rotating on a jeweled bearing mount.
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