This category gathers introductory trainings over electriciy, magnetism and waves. All these trainings (with many other good ones) can be found on the WEB. 

Electricity basics (short) - Various authors

This course gather introductory trainings on electricity from the WEB

Electricity basics - by Dereck Owens

This course gather introductory trainings to electricity from the WEB.

Magnetism basics - by Dereck Owens

This course gather introductory trainings on magnetism from the WEB

Similarities of Wave Behavior - AT&T Archives