. Elementary and dental radiography . the natural magnet, or loadstone, andthe artificial magnet. The earth may be considered a large magnet, the poles of this mag-net .being near the north and south poles of the earth. The natural mag-net is iron ore, found in nature with all the properties of the magnet, andrepresenting a portion of the great magnet, the earth. Artificial magnets are of four kindsâthe electro-magnet, the perma-nent magnet and the induced magnet. ELIiCTRlCITY y If a l)ar of soft iron l)e \vra|)])e(l witii insulated wire (wire coveredwith a nonconductor) and a current of elect
. Elementary and dental radiography . the natural magnet, or loadstone, andthe artificial magnet. The earth may be considered a large magnet, the poles of this mag-net .being near the north and south poles of the earth. The natural mag-net is iron ore, found in nature with all the properties of the magnet, andrepresenting a portion of the great magnet, the earth. Artificial magnets are of four kindsâthe electro-magnet, the perma-nent magnet and the induced magnet. ELIiCTRlCITY y If a l)ar of soft iron l)e \vra|)])e(l witii insulated wire (wire coveredwith a nonconductor) and a current of electricity be sent through thewire, the iron bar becomes magnetized while the current passes throughthe conductor, but loses its magnetism when the current ceases to a magnet is called an electro-magnet. (Fig. 2.) If the current besent through the conductor in the opposite direction to that shown in thediagram, polarity of the magnet will be changed: the north pole willbecome the south pole and the south pole the north
Size: 1192px × 2096px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, bookdecade1810, bookidelementarydenta00rape
