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I believe that if a put current through a coil of wire and if I have unlimited power to force through that current and if the coil can accept unlimited power without being degraded, I could produce a magnetic field in a vacuum of unlimited strength-is that correct? But supposedly if I applied such a magnetic field to a permeable material, there will come a point where applying stronger and stronger magnetic fields from the coil will no longer increase the magnitude of the magnetic field inside that material and that is called saturation. Therefore, if I understand this correctly (do I?), the presence of a permeable material somehow limits the maximum magnitude of a magnetic field that can exist inside it due to saturation-is that true? If it is true, please explain to me how the presence of a permeable material can possibly reduce magnetic field strength from what it would have been in a vacuum? What mechanism does that? Would it be true that if I want to have the strongest possible magnetic field, I should avoid using a permeable material since using such material limits the maximum magnetic field strength?