Learn about the physics of resistance in a wire. Change its resistivity, length, and area to see how they affect the wire's resistance. The sizes of the symbols in the equation change along with the diagram of a...

Why do the lights turn on in a room as soon as you flip a switch? Flip the switch and electrons slowly creep along a wire. The light turns on when the signal reaches it. This simulation of a Signal Circuit is from the...

This lesson plan from the Advanced Technology Environmental and Energy Center (ATEEC) asks students to list the 15 electrical appliances that are used most in their homes, then calculate the amount of electricity used...

Authored and curated by David P. Stern, these web pages introduce the concept of work and its relation to energy. An example of electric work and energy using the example of a Van de Graaff Generator. These pages are...

This page, authored and curated by David P. Stern, illustrates the concept of work against an electric force using the examples of the Van de Graaff generator and lightening. There are also shorter examples of the Xerox...