A toroid has a core (non ferromagnetic material) of inner radius `25cm` and outer radius - YouTube
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electromagnetism - Why do ferromagnetic materials channel magnetic field lines? - Physics Stack Exchange
electromagnetism - Why do ferromagnetic materials channel magnetic field lines? - Physics Stack Exchange
Materials | Free Full-Text | Perspective: Ferromagnetic Liquids
Ferromagnetic Materials (all content)
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Electromagnetic coil - Wikipedia
I. Electromagnetism Surrounding every magnet is area where they are able to exert a force on “ferromagnetic” objects. *A ferromagnetic material is one. - ppt download
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electromagnetism - Does ferromagnetic material decrease magnetic field intensity in surrounding area? - Physics Stack Exchange
Ferromagnets
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