What is an alternating magnetic field and what does it mean? - QuoraJan 24, 2014 . I presume it's just an electromagnet being run off AC for convenience. That means the magnetic field reverses twice per cycle along with the.alternating magnetic field,Magnetic field - WikipediaA magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic .. The rotating magnetic field is a key principle in the operation of alternating-current motors. A permanent magnet in such a field rotates so as to.
alternating magnetic field