If we know the inductance of an iron-cored coil to be 200mH, and we remove the iron core such that the core is now air, how exactly can we determine what the new inductance is with just this information?(adsbygoogle = window.adsbygoogle || []).push({});

I played around with the equation for inductance, however, I could not seem to get it absent of the permeability for the iron core, which is not provided. Any suggestions are greatly appreciated.

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# If we know the inductance of an iron-cored coil to be 200mH, and we

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