There is a separate article that explains magnetic fields and forces so this article focuses on magnetic materials and the difference between permanent and induced magnets. There are naturally occuring rocks that are capable of being magnetised (magnetite) and others that are already magnetised (lodestone). The important ingredient in both of these rocks is iron … Continue reading Permanent and Induced Magnetism
Magnetic fields
Magnetism is a well known effect that was observed in nature thousands of years ago. In fact, the word "magnetic" comes from the region of Greece where materials that could attract and repel each other were first discovered: this region was called Magnesia. The knowledge you need to have about magnets is very straightforward but … Continue reading Magnetic fields
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