If two bar magnets are brought close together, the like poles will repel each other, and the unlike poles attract each other. The suspended bar magnet acts like a compass in the earth's magnetic field. If the bar is suspended so that it is free to move, the magnet will align itself so that its north pole points to the geographic north of the earth. One end is the north pole, and the other is the south pole. Magnetic fields affect moving charges, and moving charges produce magnetic fields therefore, the concepts of magnetism and electricity are closely intertwined.Ī bar magnet attracts iron objects to its ends, called poles. The magnetic field of naturally occurring magnetite is too weak to be used in devices such as modern motors and generators these magnetic fields must come from electric currents.
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