Well, that's not how a magnetic field varies, since they are not spherically symmetric and only affect moving charges. You are thinking of an electric field, which is also a conservative force field. Mass is related to the number of protons and neutrons (and electrons, but they are fluff) in the nuclei of the matter under consideration.
Well, that's not how a magnetic field varies, since they are not spherically symmetric and only affect moving charges. You are thinking of an electric field, which is also a conservative force field. Mass is related to the number of protons and neutrons (and electrons, but they are fluff) in the nuclei of the matter under consideration.