Ancient people learned about magnetism from lodestones (or magnetite) which are naturally magnetized pieces of iron … See more

The magnetic flux density (also called magnetic B field or just magnetic field, usually denoted B) is a vector field. The magnetic B field vector at a given point in space is specified by two properties:
1. Its … See more

• Magnetic recording media: VHS tapes contain a reel of magnetic tape. The information that makes up the video and sound is encoded on the magnetic coating on the tape. Common audio cassettes also rely on ma… See more

Because human tissues have a very low level of susceptibility to static magnetic fields, there is little mainstream scientific evidence showing a health effect associated with exposure to static fields. Dynamic m… See more

Ferromagnetic materials can be magnetized in the following ways:
• Heating the object higher than its Curie temperature, allowing it to cool in a magnetic field and hammering it as it cools. This is the … See more

Magnetized ferromagnetic materials can be demagnetized (or degaussed) in the following ways:
• Heating a magnet past its Curie temperature; the molecular motion destroys the alignme… See more

Many materials have unpaired electron spins, and the majority of these materials are paramagnetic. When the spins interact with each other in such a way that the spins align spontaneously, the materials are called … See more