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  2. Magnetic moment - Wikipedia

    en.wikipedia.org/wiki/Magnetic_moment

    The strength (and direction) of this torque depends not only on the magnitude of the magnetic moment but also on its orientation relative to the direction of the magnetic field. Its direction points from the south pole to north pole of the magnet (i.e., inside the magnet). The magnetic moment also expresses the magnetic force effect of a magnet.

  3. List of electromagnetism equations - Wikipedia

    en.wikipedia.org/wiki/List_of_electromagnetism...

    The definitions for monopoles are of theoretical interest, although real magnetic dipoles can be described using pole strengths. There are two possible units for monopole strength, Wb (Weber) and A m (Ampere metre). Dimensional analysis shows that magnetic charges relate by q m (Wb) = μ 0 q m (Am).

  4. Magnetic field - Wikipedia

    en.wikipedia.org/wiki/Magnetic_field

    Too, a north pole feels a force in the direction of the H-field while the force on the south pole is opposite to the H-field. In the magnetic pole model, the elementary magnetic dipole m is formed by two opposite magnetic poles of pole strength q m separated by a small distance vector d, such that m = q m d.

  5. Electromagnet - Wikipedia

    en.wikipedia.org/wiki/Electromagnet

    Magnetic pole strength of electromagnets can be found from: = The force between two poles is: F = μ 0 m 1 m 2 4 π r 2 {\displaystyle F={\frac {\mu _{0}m_{1}m_{2}}{4\pi r^{2}}}} Each electromagnet has two poles, so the total force on a given magnet due to another magnet is equal to the vector sum of the forces of the other magnet's poles ...

  6. Force between magnets - Wikipedia

    en.wikipedia.org/wiki/Force_between_magnets

    The pole description is useful to practicing magneticians who design real-world magnets, but real magnets have a pole distribution more complex than a single north and south. Therefore, implementation of the pole idea is not simple. In some cases, one of the more complex formulas given below will be more useful.

  7. Demagnetizing field - Wikipedia

    en.wikipedia.org/wiki/Demagnetizing_field

    The demagnetizing field, also called the stray field (outside the magnet), is the magnetic field (H-field) [1] generated by the magnetization in a magnet.The total magnetic field in a region containing magnets is the sum of the demagnetizing fields of the magnets and the magnetic field due to any free currents or displacement currents.

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  9. Orders of magnitude (magnetic field) - Wikipedia

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

    Magnetic field strength (from lower to higher orders of magnitude) Factor (tesla) SI name SI Value CGS. Value Example of magnetic field strength 10 −18 T attotesla 1 aT: 10 fG: 5 aT: 50 fG: Sensitivity of Gravity Probe B gyroscope's "SQUID" magnetometer (most sensitive when averaged over days) [3] 10 −17 T 10 aT: 100 fG: 10 −16 T 100 aT ...