Magnetic Attraction and Repulsion. The attraction of a magnet for iron, steel, nickel, and cobalt; also of unlike poles of magnets for each other. The like poles repel.
Magnetic Circuit-breakers. An automatic switch, or breaker, whose action is excited and controlled by an electro-magnet.
Magnetic Concentration of Ores. The separation of iron and steel from their gangue by magnetic attraction. It is applicable only when either the ore or the gangue is susceptible to the magnet.
Magnetic Control. The control of a magnetic needle, magnet, index, armature, or other iron indicator in a galvanometer, ammeter, or voltmeter by a magnetic field.
Magnetic Dip. The inclination from the horizontal position of a magnetic needle that is free to move in a vertical plane.
Magnetic Field, Rotary. A magnetic field resulting from a rotary current.
Magnetic Field, Shifting. A magnetic field which rotates. Its lines of magnetic force vary, therefore, in position.
Magnetic Field, Uniform. A field of uniform strength in all portions, such as the magnetic field of the earth.
Magnetic Force. The power of attraction and repulsion exercised by a magnet; the force of attraction and repulsion which a magnet exercises, and which, in its ultimate essence, is unknown to science.
Magnetic Induction. (See [Induction, Magnetic].)