Georgia State has a Great Site Explaining Magnetism, Quantum Physics and Much More
About HyperPhysics
Rationale for Development
HyperPhysics is an exploration environment for concepts in physics which employs concept maps and other linking strategies to facilitate smooth navigation. For the most part, it is laid out in small segments or "cards", true to its original development in HyperCard. The entire environment is interconnected with thousands of links, reminiscent of a neural network.http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
Merlot Classic Award winner for 2005
"Hyperphysics was honored because of its comprehensive coverage of most of physics, the creative use of multimedia and linking, and the impact it has had on students worldwide. Online tutorials cover a wide range of physics topics, including modern physics and astronomy. Material is organized through extensive concept maps."