PURPOSE: Show the magnetic fields of parallel and antiparallel current-carrying wires.

DESCRIPTION: Overhead projector projectuals have been constructed for parallel (left photograph) and antiparallel (right photograph) currents in wires. The difference between the magnetic fields in these two cases can easily be seen. The circle to the left of the wires in the right photograph is just a dude on the plastic, and has no effect on the magnetic field.

SUGGESTIONS:

REFERENCES: (PIRA 5H15.20, 5H15.25)

EQUIPMENT: Parallel and antiparallel wire arrangements on projectuals, power supply, and overhead projector.

SETUP TIME: None.