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The classical theory of electric and magnetic fields, both in the static and dynamic case. It also covers general questions about magnets, electric attraction/repulsion, etc. Distinct from electrical-engineering.
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Information in electromagnetism and electromagnetic waves
In-depth research shows that clearly: Magnetic field and electric field are unified, magnetic field is just the one appearance of electric field, there is not independent magnetic field in the world;
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Magnetic Field Lines Vs Magnetic Vector field
"Magnetic force lines" is a misunderstanding. The truth of "magnetic force lines" is 0 magnetic moment lines, but not magnetic field force lines. A very simple method to judge it: take a magnet in eac …