The problem with this conclusion is that Maxwell’s equations (like Newton’s laws) apply only in inertial frames of reference. The contention of this article is that the experimental results are consistent with the electric polarization of translating current loops. In brief, spinning permanent magnets have spin-induced electric fields with radial components. Such radial electric fields can produce emfs across resting loads, quite as the magnetic forces produce emfs when the load moves through the B field of a resting magnet.
It is worth noting another explanation suggested for the zero emf observed when magnet and load rotate in tandem. It has been theorized that the spinning magnet "drags" its B field along, so that the (also moving) load is not cutting across any B field lines. However, the emf is nonzero when the load spins within an enclosing electromagnet, regardless of whether the electromagnet spins or remains at rest. And the emf is zero when the load is at rest and the electromagnet spins! It seems somewhat ad hoc to suppose that a spinning permanent magnet drags its magnetic field along, whereas a spinning electromagnet does not."
Frederick
