Magnets: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
{{Projects infobox | {{Projects infobox | ||
|image = | |image = | ||
| | |designers = | ||
|date = | |date = | ||
|vitamins = | |vitamins = | ||
Revision as of 17:11, 18 September 2021
| Tools: | Wrenches |
|---|---|
| Parts: | Motors, Controllers |
Introduction
A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets.
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel and cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.
