Build circuits with resistors, light bulbs, batteries, and switches. Take measurements with the realistic ammeter and voltmeter. View the circuit as a schematic diagram, or switch to a life-like view.

At this site from California Energy Commission, you can learn more about electricity safety with this coloring book. Teach children how to use electricity safely.

Read about the device used for measuring resistance in a circuit which was discovered in 1843, but had been invented a decade earlier. The inventor's name was not Wheatstone.

English scientist William Crookes was very innovative in his investigations with vacuum tubes and designed a variety of different types to be used in his experimental work. Crookes tubes are glass vacuum chambers that contain a positive...

[Free Registration/Login may be required to access all resource tools.] Defines electric current and relates electric current to different materials (insulators and conductors).

[Free Registration/Login may be required to access all resource tools.] Describes the parts of an electric circuit and identifies electric safety features and how to use electricity safely.

Learn the voltage formula for determining a measure of current electricity in this illustrated presentation.