CK-12 Foundation
Ck 12: Fourth Grade Science: Physical Science: Electric Current
[Free Registration/Login may be required to access all resource tools.] Defines electric current and relates electric current to different materials (insulators and conductors).
Boston University
Elementary Physics: Current and Resistance
A general summary of electrical resistance including a comparison of AC and DC current.
Physics Aviary
Physics Aviary: Rl in Ac Lab
This lab was designed to help students understand the difference between circuits powered by DC and circuits powered by AC. Students can see that simple changes in frequency lead to changes in the potential difference across the...
CK-12 Foundation
Ck 12: Physical Science: Direct and Alternating Current
[Free Registration/Login may be required to access all resource tools.] Describes the difference between direct current and alternating current.
Khan Academy
Khan Academy: Electrical Engineering: Circuit Analysis
Circuit analysis is the process of finding all the currents and voltages in a network of connected components. We look at the basic elements used to build circuits, and find out what happens when elements are connected together into a...
Physics Aviary
Physics Aviary: Rc in Ac Lab
This lab was designed to help students understand the difference between circuits powered by DC and circuits powered by AC. Students can see that simple changes in frequency lead to changes in the potential difference across the...
Science Struck
Science Struck: Difference Between Alternating and Direct Current
Explains what alternating current and direct current are and what they are used for.
Other
Ithaca Hs Ny/electrical Generator Ac or Dc/applet
What a lovely little applet! You can speed/slow it, change it from AC to DC, plot the voltage as it rotates, change direction, control other information. Real neat.
BBC
Bbc: Gcse Bitesize: Mains Electricity and Alternating Current Aqa
This lesson focuses on Mains Electricity and Alternating Current. Electrical supplies can be direct current (DC) or alternating current (AC). The UK mains electricity supply is about 230V at 50 Hz. It explains the difference between AC...
Creative Science Centre
Creative Science Centre: Dc Converter and Electrical Storage for Shake a Gen
This simple device uses a few components to rectify the alternating current (AC) from the shake-a-gen, store it in a capacitor and convert it into a steady direct current (DC). The output can be used to run a low power device. It is also...
PBS
Pbs American Experience: Edison's Miracle of Light
This site explores the various challenges Edison faced upon attempting to produce electric power. It contains a historical essay, a complete list of Edison's patents, information on the AC and DC currents, recordings produced by the...