When mass is accelerated does the electromagnetic force increase, decrease or remain the same?

Question

If you know the answer, was the answer ever proven or observed?

If a particle of mass was accelerated to near c would it make its effective time flow including em force completely stop, slow down or remain not affected.

Answer 1

Assuming that you are referring to the electromagnetic force between atoms of the accelerating mass, the answer is: there is no change.

Electromagnetism is not related to kinetic energy.

With respect to your clarification: No, there can be no effect on the electromagnetic forces. Remember, electromagnetism is what keeps the parts of the molecule from flying apart. If this force were removed the mass would... fly apart.

Answer 2

Acceleration and the electromagnetic force are not in any way directly related. However, if the object in question were a simple magnet, and it were moved through an electric field, it would induce an electric flux (change) in the field. If the field in question was caused by the "sea of electrons" present in a metal, the electrons would move, causing an electrical current. This is how electrical generators work.