![]() ![]() ![]() For example, the poles of the bar magnet shown in Figure 20.2 are where the paper clips are concentrated.įigure 20.5 Earth can be thought of as containing a giant magnet running through its core. A magnetic pole is the part of a magnet that exerts the strongest force on other magnets or magnetic material, such as iron. These areas are called the poles of a magnet. When humans first discovered magnetic rocks, they likely found that certain parts of these rocks attracted bits of iron or other magnetic rocks more strongly than other parts. ![]() Magnetic rocks found in Magnesia, which is now part of western Turkey, stimulated interest during ancient times. The earliest records date back to ancient times, particularly in the region of Asia Minor called Magnesia-the name of this region is the source of words like magnet. People have been aware of magnets and magnetism for thousands of years. ![]()
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