physicsfun on Instagram: "Homopolar Motor Type 2: another take on an easy to make minimalist electric motor design: battery, wire, and a magnet attached to the head of a screw which serves as the rotor. The screw hangs in contact with the battery by its point allowing for rotation with minimal friction. An o-ring secures the battery in position. This type of motor does not need a commutator- the polarity of the electromagnetic coil does not need to reverse. ➡️ Follow the link in my profile for m