Resumen de A New Direction: How a Compass Pointed the Way to Clearing Up an Attractive Misconception
Ask a typical high school student to draw a picture of how a bar magnet works and most of the drawings produced will show a �+� and �-� sign at the two ends. Some students will write �N� and �S.� If you then ask some follow-up questions, they will often resort to talking about �charges� being responsible for the magnetism. For several years, I have tried to tackle this prevalent misconception and guide students toward a more sophisticated model of domains, with at least one unexpected outcome along the way. This year, my AP Physics B class helped me develop a simple demonstration that may convince some students that charges are not in charge of magnetism.1
