Gauss's Law ensures the truth of this because it implies that a point cannot exist in empty space such that the force vector everywhere on the surface of an incremental region surrounding that point is directed inward.
Published in 1842 in the work "On the Nature of the Forces Which Regulate the Constitution of the Luminiferous Ether," oscillating fields are an exception as they will induce an alternating current in a conductor. Gauss's Law ensures the truth of this because it implies that a point cannot exist in empty space such that the force vector everywhere on the surface of an incremental region surrounding that point is directed inward. It is also violated by the principles of diamagnetism, which compensate for external magnetic fields as seen in maglev trains. FTP, name this theorem which states that there is no stable and static levitation of fixed magnets, or alternatively that point charges cannot be in equilibrium under purely electrostatic forces.
Published in 1842 in the work "On the Nature of the Forces Which Regulate the Constitution of the Luminiferous Ether," oscillating fields are an exception as they will induce an alternating current in a conductor.
Earnshaw's Theorem