Magneto's Magnetic Workshop.
Would Magneto attract every metal?
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Would Magneto attract every metal?
Fit each assembly on its seat before starting.
Select iron, copper, aluminum or wood. The iron specimen responds to a field gradient. The conducting loop responds to a changing flux and heats through resistance. Keeping those mechanisms separate explains why metal is not one magnetic material. The fictional field source must still account for field energy and resistive losses.
Illustrative field source, not a measured power of Magneto. Iron uses assumed uniform saturated magnetization 1.6 MA/m in a selected field gradient approximated by B/0.1 m. Copper and aluminum use a separate one-loop induction rig: area 0.01 m², chosen resistance 0.01 Ω copper / 0.016 Ω aluminum, emf A dB/dt, I = emf/R and opposing force I A B/0.1 m. Wood has neither response. These simplified specimen geometries omit saturation transitions, skin effects and real field maps; field energy density is B²/(2μ0), volume 0.01 m³. No static attraction of every metal is implied.
Lift the iron sample with a steady field. Then try the copper preset to compare its response.
Assemble the field source and compare four materials.