If you made a motor out of a magnet, a wire coil, and some needles, you probably remember that motors and generators depend on a rotating magnetic field. Once you know how it works, the concept is … ...

Just like a permanent-magnet motor, the energized windings create an electromagnetic field that interacts with the stator's rotating magnetic field, spinning the rotor.

As the rotor spins along with the rotating magnetic field, torque is produced. More torque is produced when the saliency ratio, or difference in magnetism between materials (in this case, the ...

An asynchronous or induction motor's rotor rotates at a somewhat slower speed than the stator field. The stator's magnetic field is therefore changing or rotating relative to the rotor. The AC ...

In response to a rotating magnetic field, the dipole moves like a compass needle, aligning all the beads along the same ...

To make an electric transformer, copper wire is often wound around a magnetic metal like iron, a setup that helps concentrate a magnetic field. (Image credit: FactoryTh via Getty Images) ...

First, propulsion via a rotating magnetic field is ten times more powerful than propulsion via a static magnetic field. The latter merely sets the direction and the bacteria have to move under ...

Microscopic magnetic particles driven by rotating fields exhibit spontaneous edge currents, with particles at the boundaries moving faster than those in the center.