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  2. Eddy current - Wikipedia

    en.wikipedia.org/wiki/Eddy_current

    A magnet induces circular electric currents in a metal sheet moving through its magnetic field. See the diagram at right. It shows a metal sheet (C) moving to the right with velocity v under a stationary magnet. The magnetic field (B, green arrows) of the magnet's north pole N passes down through the sheet.

  3. Permeability (electromagnetism) - Wikipedia

    en.wikipedia.org/wiki/Permeability...

    Scientists. v. t. e. In electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. Permeability is typically represented by the (italicized) Greek letter μ. It is the ratio of the magnetic induction to the magnetizing field as a function of the field in a material.

  4. Saturation (magnetic) - Wikipedia

    en.wikipedia.org/wiki/Saturation_(magnetic)

    magnetite [1] Seen in some magnetic materials, saturation is the state reached when an increase in applied external magnetic field H cannot increase the magnetization of the material further, so the total magnetic flux density B more or less levels off. (Though, magnetization continues to increase very slowly with the field due to paramagnetism .)

  5. Coercivity - Wikipedia

    en.wikipedia.org/wiki/Coercivity

    Coercivity, also called the magnetic coercivity, coercive fieldor coercive force, is a measure of the ability of a ferromagneticmaterial to withstand an external magnetic fieldwithout becoming demagnetized. Coercivity is usually measured in oerstedor ampere/meter units and is denoted HC. An analogous property in electrical engineeringand ...

  6. Magnetic flux - Wikipedia

    en.wikipedia.org/wiki/Magnetic_flux

    Magnetic flux. In physics, specifically electromagnetism, the magnetic flux through a surface is the surface integral of the normal component of the magnetic field B over that surface. It is usually denoted Φ or ΦB. The SI unit of magnetic flux is the weber (Wb; in derived units, volt–seconds), and the CGS unit is the maxwell.

  7. Neodymium magnet - Wikipedia

    en.wikipedia.org/wiki/Neodymium_magnet

    A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd 2 Fe 14 B tetragonal crystalline structure. [1] They are the most widely used type of rare-earth magnet. [2] Developed independently in 1984 by General Motors and in 1970s by Sumitomo Special Metals ...

  8. Sheet resistance - Wikipedia

    en.wikipedia.org/wiki/Sheet_resistance

    Sheet resistance. Sheet resistance is the resistance of a square piece of a thin material with contacts made to two opposite sides of the square. [1] It is usually a measurement of electrical resistance of thin films that are uniform in thickness. It is commonly used to characterize materials made by semiconductor doping, metal deposition ...

  9. Magnetic domain - Wikipedia

    en.wikipedia.org/wiki/Magnetic_domain

    A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction. When cooled below a temperature called the Curie temperature, the magnetization of a piece of ferromagnetic ...

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