with the magnetic field
61Magnetic domain — Several grains of NdFeB with magnetic domains made visible via contrast with a Kerr microscope. A magnetic domain describes a region within a magnetic material which has uniform magnetization. This means that the individual magnetic moments of… …
62Magnetic susceptibility — In electromagnetism, the magnetic susceptibility χm (latin: susceptibilis “receptiveness”) is a dimensionless proportionality constant that indicates the degree of magnetization of a material in response to an applied magnetic field. A related… …
63Magnetic declination — Example of magnetic declination showing a compass needle with a positive (or easterly ) variation from geographic north. Magnetic declination is the angle between magnetic north (the direction the north end of a compass needle points) and true… …
64magnetic dipole — Tiny magnet with subatomic dimensions, equivalent to the flow of electric charge around a loop. Examples include electrons circulating around atomic nuclei, rotating atomic nuclei, and single subatomic particles with spin. On a large scale, these …
65Magnetic level gauge — A magnetic level gauge is used to measure the level of fluids. A magnetic level gauge includes a “floatable” device that can float both in high and low density fluids. Magnetic level gauges may also be designed to accommodate severe environmental …
66magnetic susceptibility — Elect. the coefficient or set of coefficients of the magnetic intensity in any expression giving the components of magnetization as linear combinations of the components of magnetic intensity. Also called susceptibility. * * * ▪ physics… …
67Magnetic detector — 1902 1918: Marconi s Wireless Magnetic Detector (London) The magnetic detector was one of the first practical devices able to make radio signals audible through a pair of headphones. It was not as sensitive as some detectors but despite that, it… …
68Magnetic anomaly detector — MAD rear boom on P 3C The SH 60B Seahawk helicopter carries …
69magnetic resonance imaging — ▪ medicine three dimensional diagnostic imaging technique used to visualize organs and structures inside the body without the need for X rays (X ray) or other radiation. Magnetic resonance imaging (MRI) is valuable for providing detailed… …
70Magnetic helicity — In plasma physics, magnetic helicity is the extent to which a magnetic field wraps around itself . It is a generalization of the topological concept of linking number to the differential quantities required to describe the magnetic field. As with …
