{{Projects infobox |image = |designers = |date = |vitamins = |materials = |transformations = |lifecycles = |tools = [[Wrenches]] |parts = [[Motors]], [[:Category:Controllers|Controllers]] |techniques = |files = |suppliers = |git = }} [[Category:Parts]] [[Category:Electric parts]] =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. =Challenges= =Approaches= =References= * [https://en.wikipedia.org/wiki/Magnet Wikipedia: Magnet]