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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.

1 vote

Terminal velocity of a magnet on a copper pipe

Because while the magnet drops, it induces currents in the copper pipe, and in turn produces a magnetic field that exerts magnetic force opposing the movement of the magnet. Like air resistance, this …
Nathan Hung's user avatar
2 votes
1 answer
357 views

Magnetic induction by changing permeability of a uniform magnetic field?

As far as I know, magnetic fields are created by either magnet or running current, which both can be changed by changing the permeability of the medium and thus change the magnetic flux through the co …
Nathan Hung's user avatar