In the demonstration where a magnet is slid down a tube of conductive material, the magnet drops at a slowed and constant rate due to eddy current braking effect.
What factors will contribute to the intensity of this braking effect? I suppose one factor would be the strength of the magnet. However, it seems like the conductivity of the tube is not simple proportional to the braking effect, since I have read in other questions that a superconductor would in fact offer no resistance in such a scenario. (I might be wrong on that, but I hope you do not dwell on it too much in your answer/comment.)