Simple Coil Motor

Coil spins repeatedly. Ask students to predict what will happen. Energize balanced coil above magnet. Key idea: Magnetic force on current in opposite sides of coil produces torque; commutation keeps rotation going. Ask: What has to change every half-turn to keep it spinning? Safety and cleanup: Low voltage; teacher checks coil contacts. https://www.vanderbilt.edu/physicsdemonstration/davesdemos/demonstrations/demo207.htm