magnetsare

Magnetsare is not a standard term in physics; the concatenated form may be encountered as a misspelling or stylized project name. If the intended topic is magnets, this article provides a concise overview of their basic properties and uses. Magnets are objects that produce magnetic fields and attract materials such as iron. The magnetic field arises from the collective alignment of microscopic magnetic moments (domains) within the material. Permanent magnets maintain a magnetic field without electrical power; electromagnets generate stronger fields when electric current passes through a coil.

Common permanent magnets are made from ferromagnetic materials. Iron, nickel, cobalt and alloys such as alnico, ferrites, and the rare-earth magnets neodymium-iron-boron (NdFeB) and samarium-cobalt (SmCo) are widely used. The term coercivity describes a magnet's resistance to demagnetization; high-coercivity magnets are more stable in heat and external fields. Electromagnets use coils of wire; their field strength is proportional to current and the number of turns, and can be switched off. Applications include motors, generators, transformers, loudspeakers, and magnetic resonance imaging (MRI). Magnetic storage devices rely on magnets to store information in hard disk drives and tape.

History of magnetism traces back to lodestone observed by ancient peoples. In the 18th and 19th centuries, scientists such as William Gilbert, Hans Christian Ørsted, Michael Faraday, and James Clerk Maxwell developed foundational ideas, culminating in Maxwell's equations that describe the relationship between electricity and magnetism.