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  2. Orders of magnitude (magnetic field) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    This page lists examples of magnetic induction B in teslas and gauss produced by various sources, grouped by orders of magnitude.. The magnetic flux density does not measure how strong a magnetic field is, but only how strong the magnetic flux is in a given point or at a given distance (usually right above the magnet's surface).

  3. Mathematical descriptions of the electromagnetic field

    en.wikipedia.org/wiki/Mathematical_descriptions...

    For example, consider a conductor moving in the field of a magnet. [8] In the frame of the magnet, that conductor experiences a magnetic force. But in the frame of a conductor moving relative to the magnet, the conductor experiences a force due to an electric field. The motion is exactly consistent in these two different reference frames, but ...

  4. Halbach array - Wikipedia

    en.wikipedia.org/wiki/Halbach_array

    Using this method, as well as soft pole pieces within the design, 4.5 T in a working volume of 20 mm 3 was achieved, [26] and this was increased further to 5 T in 2002, [27] although over a smaller working volume of 0.05 mm 3. As hard materials are temperature-dependent, refrigeration of the entire magnet array can increase the field within the ...

  5. Permeability (electromagnetism) - Wikipedia

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

    Permeability varies with a magnetic field. Values shown above are approximate and valid only at the magnetic fields shown. They are given for a zero frequency; in practice, the permeability is generally a function of the frequency.

  6. Force between magnets - Wikipedia

    en.wikipedia.org/wiki/Force_between_magnets

    Magnets exert forces and torques on each other through the interaction of their magnetic fields.The forces of attraction and repulsion are a result of these interactions. The magnetic field of each magnet is due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the mater

  7. Electromagnet - Wikipedia

    en.wikipedia.org/wiki/Electromagnet

    (A non-circuit example would be a magnet with a straight cylindrical core.) To determine the force between two electromagnets (or permanent magnets) in these cases, a special analogy called a magnetic-charge model can be used. In this model, it is assumed that the magnets have well-defined "poles" where the field lines emerge from the core, and ...

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