A homopolar motor is the most minimal form of an electric motor: one battery, one magnet, and a conductor. No coils, no commutator, no electronics—just direct conversion of electrical energy into continuous motion. In this demo: * A AA battery sits on a stack of neodymium magnets * A heart-shaped copper wire touches the battery terminal at the top and the magnet at the bottom * The wire begins to spin immediately What’s happening physically: 1. Current flow The copper wire completes a circuit between the positive terminal of the battery and the magnet at the negative end. Charge carriers (electrons) move through the wire. 2. Magnetic field The magnets create a static magnetic field (B-field), typically aligned along the axis of the battery. 3. Lorentz force As current flows through the wire inside a magnetic field, each segment of the wire experiences a force: F = q(v × B) → macroscopically: F = I(L × B) This force is perpendicular to both the direction of current and the m...