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2. Bohr magneton - Wikipedia

   en.wikipedia.org/wiki/Bohr_magneton

   The idea of elementary magnets is due to Walther Ritz (1907) and Pierre Weiss.Already before the Rutherford model of atomic structure, several theorists commented that the magneton should involve the Planck constant h. [6]

3. Arago's rotations - Wikipedia

   en.wikipedia.org/wiki/Arago's_rotations

   Arago remarked that it gave evidence of the presence of a force which only existed whilst there was relative motion between the magnet-needle and the mass of copper. He gave the phenomenon the name of magnetism of rotation. In 1825 he published a further experiment, in which, arguing from the principle of action and reaction, he produced a ...

4. Terrella - Wikipedia

   en.wikipedia.org/wiki/Terrella

   Kristian Birkeland and his magnetized terrella experiment, which led him to surmise that charged particles interacting with the Earth's magnetic field were the cause of the aurora. [ 1 ] Kristian Birkeland was a Norwegian physicist who, around 1895, tried to explain why the lights of the polar aurora appeared only in regions centered at the ...

5. Force between magnets - Wikipedia

   en.wikipedia.org/wiki/Force_between_magnets

   The most elementary force between magnets is the magnetic dipole–dipole interaction. If all magnetic dipoles for each magnet are known then the net force on both magnets can be determined by summing all the interactions between the dipoles of the first magnet and the dipoles of the second magnet.

6. Electron magnetic moment - Wikipedia

   en.wikipedia.org/wiki/Electron_magnetic_moment

   The electron is a charged particle with charge − e, where e is the unit of elementary charge. Its angular momentum comes from two types of rotation: spin and orbital motion. From classical electrodynamics, a rotating distribution of electric charge produces a magnetic dipole, so that it behaves like a tiny bar magnet.

7. Faraday's law of induction - Wikipedia

   en.wikipedia.org/wiki/Faraday's_law_of_induction

   Within two months, Faraday had found several other manifestations of electromagnetic induction. For example, he saw transient currents when he quickly slid a bar magnet in and out of a coil of wires, and he generated a steady current by rotating a copper disk near the bar magnet with a sliding electrical lead ("Faraday's disk").