A calculation of the curl of B starting with the Biot-Savart law leads directly to the inclusion of the displacement current into Maxwell's equations; one must assume slowly moving charges, slowly varying currents, and a neglect of the radiation field at large distances and after a long time.

This content is only available via PDF.
AAPT members receive access to the American Journal of Physics and The Physics Teacher as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.