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Use the verbal directions below instead of a handout:

Students should be assigned to work in groups of three and given the following instructions using the visual of a hula hoop or other large ring: “This is a ring with total charge Q and radius R spinning with period T. Find the magnetic field due to this ring in all space. Stop when you have an expression that could be evaluated using Maple.”

Students do their work collectively with markers on a poster-sized sheet of whiteboard at their tables.