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.
BBC
Bbc: Gcse Bitesize: Electric Circuits
Current transfers energy around circuits. Circuit components have various properties that can be measured and then used to make circuits for control and also circuits for testing other components.
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...
Concord Consortium
Concord Consortium: Measuring Time and Frequency
The voltage in AC circuits oscillates at a rate known as the frequency. With an oscilloscope, see and measure the length of time between signals, and calculate the frequency of an AC signal.
Concord Consortium
Concord Consortium: Measuring Phase in Ac Circuits
See how oscillations in an AC circuit don't always rise and fall together.
Massachusetts Institute of Technology
Mit: Inventor of the Week: Nikola Tesla: The Electro Magnetic Motor
Use this site to learn about the inventor of the electro-magnetic motor, Nikola Tesla. Find out why Tesla's experimentation with alternating current was so important to later inventions and use of electricity.
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).
CK-12 Foundation
Ck 12: Physics Simulation: Ac Transformer
[Free Registration/Login Required] Learn about how high-voltage alternating current (AC) electricity generated by a power station is converted into low-voltage AC electricity for your home using this interactive simulation. A PDF...
Florida State University
Florida State University: Molecular Expressions: Ac Generator Action
Molecular Expressions at Florida State University offers a java applet to show the a working AC generator.
PBS
Pbs: War of the Currents
Read here about the industrial "war" that took place between the patents on alternating and direct current.
Other
Team Rocs: Resistance vs. Impedance
Compares resistance and impeadance using the example of car audio.
Other
Simple Ac Circuits
A general overview of simple AC circuits. Included is a Java applet that lets you change components from a resistor, to a capacitor or coil.
Physics4kids
Physics 4 Kids: Electricity and Magnetism Quiz
Take this 10 question multiple choice quiz on electricity and magnetism.
Physics4kids
Physics4 Kids: Electricity and Magnetism: Current
Explains electric current, how it produces heat, and the difference between a direct current and an alternating current.
Physics4kids
Physics4 Kids: Electricity and Magnetism: Alternating Current
Alternating current, defined and illustrated.
Tech Target
What Is: Alternating Current (Ac)
This site provides a brief explanation of what an AC current is.
Tech Target
What Is: Resistance
A short summary of resistance and how it is measured. Including information on AC and DC.
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
Alternating Current Series Circuit
This site outlines a lab dealing with Alternating Current Series Circuit. It includes graphs and formulas, and a list of questions associated with the lab.
Science4Fun
Science4 Fun: Transformer
Learn about transformers, how they work, the turn ratio, and their uses.
Science4Fun
Science4 Fun: Voltage, Current, and Resistance
Illustrated explanation of voltage, current, and resistance and the relationship between them.
Mocomi & Anibrain Digital Technologies
Mocomi: Nikola Tesla Biography
Interesting biographical information, fun facts, and famous quotes about Nikola Tesla known for his work with alternating current.
Curated OER
Physics4 kids.com: Direct Current and Alternating Current
Illustration showing the difference between a direct current and an alternating current.