Stuff You Should Know Selects: How Magnets Work
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Aug 12, 2023 Dive into the captivating world of magnets, where you'll discover their fundamental properties and how they attract metals. Explore the fascinating history of magnets, from ancient Greece to modern technology. Learn about various types of magnets, including ceramic and rare earth, and their surprising everyday applications. Delve into the science of magnetic domains and the atomic mechanisms behind magnetism. Plus, hear intriguing tales of how magnets have shaped communication and technology, all sprinkled with humor and engaging insights.
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Lodestone Discovery
- Lodestone, a naturally magnetic rock, was discovered in Magnesia, Greece.
- This discovery led to experimentation with magnetism and the creation of early compasses.
Magnet Basics
- Magnets attract ferrous metals, have north and south poles, and opposites attract while like poles repel.
- Earth is the largest magnet, and magnetism is a fundamental force like gravity and nuclear forces.
Types of Magnets
- Permanent magnets always have a magnetic field, while temporary magnets only have one in another magnetic field’s presence.
- Electromagnets become magnetic with an electric current, like in doorbells.