wkm Bar Magnet 4 Inch - Multipurpose Office Magnets Pack of 2  (Red, Black)

A bar magnet produces a magnetic field around itself, extending from the north pole to the south pole.The bar magnet has two ends, known as poles: the north pole and the south pole.The strength of a bar magnet is determined by factors such as the material it is made of and its size.Bar magnets are typically made of ferromagnetic materials, such as iron or certain alloys, that can be easily magnetized and retain their magnetic properties.Inside the material of a bar magnet, magnetic domains (small regions with aligned magnetic moments) tend to align themselves when the material becomes magnetized.The dipole moment points from the south pole to the north pole.Bar magnets have various applications, including their use in compass needles, magnetic stirrers, magnetic locks, and various educational demonstrations to illustrate principles of magnetism.Over time, external factors such as heat or physical shocks can lead to the demagnetization of a bar magnet, causing a loss of its magnetic properties.