The answers reference the strongest eletromagnets so far produced as being from bitter electromagnets and the highest man made field being 45T at enormous cost (liquid helium) and 30MW of power.

The answers reference the strongest eletromagnets so far produced as being from bitter electromagnets and the highest man made field being 45T at enormous cost (liquid helium) and 30MW of power. Noting that the wikipedia page links to some very old archived pages I googled and things have improved slightly a much smaller superconducting device gets 45.5T at only 18MW.

Note: the mechanism is allowed to use diamagnetism (ie. superconductors). It need not rely entirely on electromagnets.

A major practical obstacle is that magnetic fields follow a cube law rather than a square law so even more power is required to produce a strong one.

Note: the mechanism is allowed to use diamagnetism (ie. superconductors). It need not rely entirely on ferrous electromagnets.

A major practical obstacle is that magnetic fields follow a cube law rather than a square law so even more power is required to produce a strong one.

This question is relevant:

This How strong can an electromagnet be?

The answers reference the strongest eletromagnets so far produced as being from bitter electromagnets and the highest man made field being 45T at enormous cost (liquid helium) and 30MW of power.

Tensile strength of a chain of electromagnets

Tensile strength of a chain of electromagnets