In general by strict mathematical definition of conservative fields, no magnetic vector field in any case even static can be conservative thus path-independent since it has no zero curl which is necessary for a field to be conservative [1]. In addition all conservative vector fields must be also irrotational (i.e. vortex, spiral). Even if a magnetic or other field special case, is found to be with zero curl that does not mean necessarily that it is conservative if it does not satisfy the condition in 3D space,

F:R3→R3 is continuously differentiable in a simply connected domain W∈R3 and its curl is zero:

https://mathinsight.org/path_dependent_zero_curl

Nevertheless, it is a mystery why the static magnetic field of magnet for example exhibits all the effects of a conservative field without having its properties?

No energy is consumed when a single charge particle is introduced forcing it to a circulation where equal amount of potential energy is converted to kinetic energy and vise versa. Energy is conserved thus no real work is done by the field thus conservative in effect!

Therefore a correct answer of time invariant static magnetic fields being conservative or not? Is I believe that they are virtual conservative fields by absence of any better explanation of this phenomenon and contradiction.

What are your thoughts and experience about this phenomenon?

Emmanouil

p.s The above virtual description of static conservative magnetic field begs a definitive better answer I believe and is a mystery proving how much more we have to investigate on this matter of Electromagnetism.

References

[1] https://www.quora.com/Is-magnetic-field-conservative-or-non-conservative

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