Original plate illustrating Michael Faraday’s homopolar electric motor. Credit: Quarterly Journal of Science, Literature and the Arts, 1821, volume XII.
Electric Universe proponents argue that galaxies might behave like homopolar motors. In essence an homopolar motor is a rotating conductive disc driven by induced magnetic fields.
From National MagLab:
The magnetic field lines around an electrified wire form concentric circles around the wire. The direction of the magnetic field is perpendicular to the wire and is in the direction the fingers of your right hand would curl if you wrapped them around the wire with your thumb pointing in the direction of the current.