Copper is a non-ferromagnetic material, and magnets will not attract it.

However, due to the change of magnetic flux in the whole copper sheet, eddy current will appear in the copper sheet. The magnetic field generated by eddy current is opposite to the thin strong magnetic field, and there is a mutually repulsive magnetic force between the copper sheet and the thin strong magnetic field. According to the distribution of magnetic field lines, the closer to the explosive magnetic field, the greater the change of magnetic flux in the copper sheet and the greater the mutual repulsion. therefore ...

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