Ampere's Law

A class demo introduces students to the force between two current carrying loops, comparing the attraction and repulsion between the loops to that between two magnets. After a lecture on Ampere's law (including some sample cases and problems), students begin to use the concepts to calculate the magnetic field around a loop. This is applied to determine the magnetic field of a toroid, imagining a toroid as a looped solenoid. Students use Ampere's law to solve some homework problems.