Copyright © 1999 by the Massachusetts Institute of Technology . All rights reserved.

Here are links to some of the Java applets that David Northridge and John Belcher developed. 

Generating and Reflecting A Plane Electromagnetic Wave
Magnet Falling Through Conducting Ring Applet
Interaction of Two Permanent Magnets
Vector Addition
Superposition of Forces
Vector Field and Field Lines of Two Charges
Charge Motion in an Attractive Potential
Charge Motion in a Repulsive Potential
Magnetic Field of Two Moving Charges From Biot-Savart