University of New South Wales (Australia)
University of New South Wales: Einstein Light
Einstein Light highlights the Theory of Special Relativity and related topics. Learn how Galileo, Maxwell, and Einstein contributed to our knowledge of relativity, electricity, magnetism, and time by watching fun, interactive modules.
Canada Science and Technology Museum
Canada Science and Technology Museum: Sound Recording
The Canada Science and Technology Museum tells the history of recorded sound. Learn about the hundreds of sound recording devices in the museum's archives. These are grouped into four main categories: Acoustical-Mechanical Systems,...
Science Buddies
Science Buddies: A Battery That Makes Cents
Batteries are expensive to purchase in a store, but you can make one your self for exactly 24 cents. In this experiment, you will make your own voltaic pile using pennies and nickels and determine how many coins in a pile will make the...
Concord Consortium
The Concord Consortium: Molecular Workbench: The Hall Effect
Adjust the magnetic field in this simulation to see how the flow of electricity is affected.
Georgia State University
Georgia State University: Hyper Physics: Voltage
Electrical currents and voltage are defined and illustrated.
TeachEngineering
Teach Engineering: Whose Field Line Is It, Anyway?
Students teams each use a bar magnet, sheet of paper and iron shavings to reveal the field lines as they travel around a magnet. They repeat the activity with an electromagnet made by wrapping thin wire around a nail and connecting...
Science Museum, London
Science Museum: Launchpad Online: Launchball
Use your knowledge of physics concepts like electricity, reflection, magnetism, etc. to complete interactive online puzzles.
Science Buddies
Science Buddies: How to Make a Homopolar Motor
In this quick activity, you will make a simple motor using nothing but a battery, magnet, and a piece of wire.
TeachEngineering
Teach Engineering: The Good, the Bad and the Electromagnet
Using plastic straws, wire, batteries and iron nails, student teams build and test two versions of electromagnets-one with and one without an iron nail at its core. They test each magnet's ability pick up loose staples, which reveals the...
Science Buddies
Science Buddies: Build Your Own Windmill Generator
Build your own windmill and see how the wind can be converted into energy to produce electricity. This science fair project should help you understand the use of wind as a source of alternative energy. The Science Buddies project ideas...
Science Bob Pflugfelder
Science Bob: Build an Electromagnet!
This site presents a procedure for creating your own electromagnet using an iron nail, some wire, and a battery. The site illustrates a connection between electricity and magnetism.
National High Magnetic Field Laboratory
Magnet Academy: Arc Lamp 1876
Fire lighted the night for many centuries. Then came Sir Humphry Davy and the birth of the arc lamp, an invention built upon in the years that followed by many.
University of Oregon
University of Oregon: Electromagnetism
A solid summary from the University of Oregon of the work of James Maxwell Clerk, Michael Faraday, and others in the field of electric and magnetic phenomena. This is a fine essay.
National High Magnetic Field Laboratory
Magnet Academy: Bubble Chamber 1952
To understand a bubble chamber, picture the long, white streak an airplane leaves in its wake. That's water vapor produced by condensation from the plane's hot exhaust. Until the water particles evaporate, you can follow the streak to...
National High Magnetic Field Laboratory
Magnet Academy: Cyclotron 1931
A cyclotron is a machine that allows scientists to shoot particle beams at other particle beams. The result of doing this is a spectacular smash up - but that's not why scientists do it.
National High Magnetic Field Laboratory
Magnet Academy: Coaxial Cable 1929
As more and more American households acquired telephones, the pressure was on to create a better cable to accommodate the increasing demand. Engineers Lloyd Espenschied and Herman Affel answered the call.
National High Magnetic Field Laboratory
Magnet Academy: Audion 1906
Two years after Englishman John Ambrose Fleming invented a two-electrode vacuum tube, American inventor Lee De Forest one-upped him by developing a tube with three electrodes.
National High Magnetic Field Laboratory
Magnet Academy: Gauss Weber Telegraph 1833
Several years before the telegraph created by American inventor Samuel Morse revolutionized communications, two German scientists built their own functional telegraph.
National High Magnetic Field Laboratory
Magnet Academy: Gramme Dynamo 1871
Zenobe Theophile Gramme (1826 - 1901) invented the first industrial generator, or dynamo. A deceptively simple-looking machine, it consisted of 30 coils wrapped around a spinning ring of iron.
National High Magnetic Field Laboratory
Magnet Academy: Bell Telephone 1876
Acoustics, variable resistance and allegations of foul play contribute to the exciting story of the invention of the telephone.
Mocomi & Anibrain Digital Technologies
Mocomi: What Is Electromagnetism?
Explains electromagnetism, the difference between a permanent magnet and an electromagnet, uses of electromagnetism, and steps for making a simple electromagnet.
Curated OER
Ultra Simple Electric Generator
All the components are here for you to build an electric generator. Parts list, construction, testing, how it works, feel the electrons, and more.
Curated OER
Physics4 kids.com: Electricity & Magnetism: Resistance
Simple line graph showing the inverse relationship between the amount of electrical resistance and the amount of work possible.
Vision Learning
Visionlearning: Physics: Light Ii: Electromagnetism
Instructional module focusing on light and electromagnetism. Discussion includes historical discoveries that led to the understanding of the electromagnetic spectrum. Site also includes an interactive practice quiz and links relating to...