Homopolar Motor: a minimalist electric motor- battery, wire, and magnet. This type of motor does not need a commutator- the polarity of the electromagnetic coil does not need to reverse. The challenge with this design is balancing the coil to center on the battery as it rotates. Fun to make and experiment with different coil shapes and symmetries. A favorite DIY physics toy! ➡️ Follow the link in my profile for more info on how to make, or where to get, the amazing items featured here on @physic