This National Aeronautics and Space Administration site describes long-term changes in Earth's magnetic field, and how magnetic stripes in the Atlantic seafloor provide evidence for reversals of this field. The site...

This series of web pages provides information on a range of topics regarding charged particles. Starting with the properties of atomic electrons, this material describes the Edison and photoelectric effects, the...

This set of five web pages provides a non-mathematical introduction to the motion of charged particles in magnetic fields. These pages describe the "guiding center motion" which determines the motion of ions and...

This site includes a series of lab activities that demonstrate the concept of electromagnetic induction. The activites vary in complexity, but all of them can be performed using simple electronic lab equipment such as...

This item is a comprehensive beginning tutorial on generators and motors. Fully illustrated, it explains how current flows through a conductor and how motors change electric energy into mechanical energy. The author...