Download the original rotating magnetic field simulator by Dr. George McPherson called RotSIM
Dr. McPherson has a nice book on electric machinery. It is now out of print, but you can find a used copy at Amazon
Download a PowerPoint background with a bunch of resistors, inductors, and capacitors.
The first two pages show examples of a black background. The third page shows and example of a white background. The last two pages have a white background with grey electrical components and figures with a transparent background.