What magnets are called: a) diamagnets; b) paramagnets; c) ferromagnets; d) ferrites?

a) diamagnetics – substances whose magnetic permeability is less than unity; b) paramagnets – substances whose magnetic permeability is greater than unity; c) ferromagnets – substances, the magnetic permeability of which, by me, is greater than unity; a) ferrites – substances, the magnetic permeability of which I have more than unity, but high specific resistance.

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