Magenet

—A body po e ing the property of attracting to itself particles of iron. A natural magnet is a piece of magnetite or magnetic oxide of iron which will attract other iron, will repel or attract similar magnets according to their relative positions, and when suspended so as to be free to turn will set itself in a definite direction with respect to the earth’s magnetic poles. An artificial magnet is a piece of iron or steel which has acquired magnetic properties. An electromagnet is a piece of iron which has been magnetized by an electric current pa ing through a wire coiled about the iron. A polarized electromagnet is one whose core is a permanent magnet. Such magnets are used in duplex telegraphy. he armature of this magnet is released only by a current in a fixed direction.