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    would iron wire block high frequencies

    Would iron wire become hysteritic and attenuate high frequency AC if it were used as a conductor?

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    Re: would iron wire block high frequencies

    Ferromagnetic materials are bad conductors for high frequent AC. Not due to "hysteresis" but due to effect of permeability on skin depth. See e.g. https://en.m.wikipedia.org/wiki/Skin_effect


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    Re: would iron wire block high frequencies

    Would it also slow down sharp unidirectional di/dt edges?



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    Re: would iron wire block high frequencies

    Would iron wire become hysteritic and attenuate high frequency AC if it were used as a conductor?
    Yes, but thin wires will have only a small effect. Imagine a straight long iron wire carrying some current. The magnetic lines of force will be circular, perpendicular to the wire and will see only a little effect due to the magnetic properties of the metal.

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    Would it also slow down sharp unidirectional di/dt edges?
    Again, yes but the effect will be small. The self inductance of a iron wire will be more because of the higher permeability. But most of the magnetic lines for force will see only little bit of iron in their way. Sharp di/dt will have high AC frequency component and that will force the current towards the edge of the conductor. Such a case can be approximated as a iron core with a highly conducting surface. The exact magnitude of the effect will depend on the thickness of the wire and the slope of the di/dt curve.


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