permanent magnet material
101Stepper motor — A stepper motor (or step motor) is a brushless, synchronous electric motor that can divide a full rotation into a large number of steps. The motor s position can be controlled precisely, without any feedback mechanism (see open loop control).… …
102Neutron generator — Neutron generators are neutron source devices which contain compact linear accelerators and that produce neutrons by fusing isotopes of hydrogen together. The fusion reactions take place in these devices by accelerating either deuterium, tritium …
103Retentivity — The retentivity of a material is its capacity to remain magnetized after the external magnetizing field has ceased to exist. A material with high retentivity (i.e. iron) will keep some magnetic properties, it will become a permanent magnet,… …
104energy conversion — ▪ technology Introduction the transformation of energy from forms provided by nature to forms that can be used by humans. Over the centuries a wide array of devices and systems has been developed for this purpose. Some of these energy …
105Hammond organ — A close up of the Hammond L 100 organ, with the drawbars in the foreground The Hammond organ is an electric organ invented by Laurens Hammond in 1934 and manufactured by the Hammond Organ Company. While the Hammond organ was originally sold to… …
106State of matter — A state of matter (or physical state, or form of matter) has physical properties which are qualitatively different from other states of matter.Traditionally, three states of matter were recognized: solid, which maintains a fixed volume and shape; …
107Hybrid electric vehicle — The Toyota Prius is the world s top selling hybrid car, with cumulative global sales of 2.36 million units by August 2011.[1] A hybrid electric vehicle (HEV) is a type of hybrid vehicle and electric vehicle which combines a conventional internal …
108Iron filings — are very small pieces of iron that look like a dark powder. They are very often used in science demonstrations to show the direction of a magnetic field. Since iron is a ferromagnetic material, a magnetic field induces each particle to become a… …
109electret — [ɪ lɛktrɪt] noun Physics a permanently polarized piece of dielectric material, analogous to a permanent magnet. Origin C19: blend of electricity and magnet …
110electret — n. Physics a permanently polarized piece of dielectric material, analogous to a permanent magnet. Etymology: ELECTRICITY + MAGNET …
