Example: Electric and magnetic forces
One of the best “teacher-to-teacher” guides* in a discussion of how to help students understand the nature of magnetic forces contains the following sentence (in passing):
- ...This paves the way for eliminating misconceptions such as repulsion between a north magnet pole and a positive electric charge, and so on.
*A. Arons, A Guide to Introductory Physics Teaching (Wiley, 1990)
There are surprises when we look at the response of a class.