Description Expand Description

The power grid is the system of producers and consumers of electricity. It includes power generators, the users of electricity, switches that control the electricity, and the system of substations, power lines, and transformers that deliver the electricity. A community might have a generator to provide its power. The generator may be able to vary its production as the usage of the customers changes, but there may be times when the demand for energy is too great for the generator. Then the community buys electricity from another source. At other times, the generator may be making more electricity than the community is using, so it wants to sell it.

Challenges Expand Challenges

   1   2   3   4   5   >
When the applet opens, are the generators making more or less power than the communities are using?

Resources for Students and Teachers Expand Resources

Video Tutorial

We have recorded a short tutorial for this applet, to help familiarize you with how to use it.

Quick-Start Guide

Use this quick-start guide to learn about the features of this applet.


Lessons have been created to help you use this applet in your classroom.

Collapse Sidebar
The latest Java update (J7u51) has caused Java applets not to load for many people due to a change in security settings. We are working on a fix to remedy the issue. Please check back soon. If you would like us to contact you when our applets are working again, you can contact us. You can read more about this issue here, including workarounds which will allow the applets to run.