Physics and Chemistry

Electricity and Magnetism

What materials are used to make the most powerful permanent magnets?

The most powerful permanent magnets are made from alloys of iron, boron, and neodymium. Magnetic strength is measured in units called tesla and gauss. One tesla equals 10,000 gauss. Most of the magnets used to decorate the refrigerator are 10 gauss. The most powerful permanent magnets produce magnetic fields of approximately 1.5 tesla.


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