AC and DC Applied To RL Circuit

Description
Self induction and growth and decay of current in LR-DC circuit has been discussed.An inductor opposes the build up of current-this fact is shown using a circuit of light bulbs and a large inductor.LR circuits with alternating currents is shown to reduce current of high frequency.The phase lag of the current due to self inductance makes magnetic levitation using an AC coil possible. Magnetic levitation using AC is demonstrated.

Prof. Walter Lewin, 8.02 Electricity and Magnetism, Massachusetts Institute of Technology: MIT OpenCourseWare), http://ocw.mit.edu (Accessed June 22, 2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc