In this instance, the slip rings allow the current to be transmitted from the rotating coil to the external circuit. As one side of the coil moves up through the magnetic field, a potential ...

But, there may be another way, albeit a rather special case, where a magnet can not only be levitated, but locked in place using a rotating magnetic field. The video shows a demonstration of how ...

It explains how electrons are accelerated by an electron gun and then deflected by a magnetic field created by Helmholtz coils. The experiment measures the mass of an electron by analyzing the ...