National High Magnetic Field Laboratory
Magnet Academy: Magnetic Field Around a Wire, I
Whenever current travels through a conductor, a magnetic field is generated. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Magnetic Shunt
Magnetic shunts are often used to adjust the amount of flux in the magnetic circuits found in most electrical motors. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Magnetic Core Memory
Magnetic core memory was developed in the late 1940s and 1950s, and remained the primary way in which early computers read, wrote and stored data until RAM came along in the 1970s. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Lorentz Force
Learn about the Lorentz force with the help of this tutorial, in which a wire fashioned into a pendulum moves inside a magnetic field. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Lodge's Experiment
Sir Oliver Lodge's experiment demonstrating the first tunable radio receiver was an important stepping stone on the path toward the invention of a practical radio.
National High Magnetic Field Laboratory
Magnet Academy: Tape Recorder
Two heads - or even three - are better than one when it comes to understanding how tape recorders exploit electromagnetic induction. This is a Java tutorial that explains how tape recorders reproduce sound.
National High Magnetic Field Laboratory
Magnet Academy: Magnetic Field of a Solenoid
You can create a stronger, more concentrated magnetic field by taking wire and forming it into a coil called a solenoid. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Rheostat
After discovering the nature of electrical resistance, scientists devised instruments like this one to measure and control it. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Pixii Machine
This "magneto-electric machine" was the first to turn motion into electricity. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Parallel Wires
A pair of parallel wires serves to illustrate a principle that French Scientist Andre-Marie Ampere was the first to comprehend, back in 1820. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Oscillator
Oscillators are a type of circuit found in many types of electronic equipment, including clocks, radios and computers. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: Oersted's Compass
Recreate the discovery by Hans Christian Oersted about the relationship between electricity and magnetism in this very simple experiment.
National High Magnetic Field Laboratory
Magnet Academy: Torsion Balance
Experiment with the torsion balance and see what happens first by giving the rod a charge, and then by moving the charged rod closer to the outer metal sphere of the instrument. Observe what happens to the needle as the charge increases.
National High Magnetic Field Laboratory
Magnet Academy: Torsion Balance 1785
Read about Charles Augustin de Coulomb, who didn't invent the torsion balance, but was the first to discover it could be used to measure electrical charge- the first device capable of such a feat.
National High Magnetic Field Laboratory
Magnet Academy: Low Temperature Physics
Why do physicists want to study things at temperatures so cold atomic motion almost comes to a halt? And how do they create such frigid environments, anyway? Read on for the what, how and why of low temperature physics.
National High Magnetic Field Laboratory
Magnet Academy: Giant Magnetoresistance: The Really Big Idea Behind a Very Tiny Tool
This itsy-bitsy phenomenon makes your iPod and hard drive tick.
National High Magnetic Field Laboratory
Magnet Academy: Oil Drop
It may look like a simple black blob, but an oil drop is in fact a phenomenally complex mix of immense molecules called hydrocarbons. Using a type of mass spectrometry called FT-ICR, scientists can analyze oil and other macromolecules...
National High Magnetic Field Laboratory
Magnet Academy: Cryogenics for English Majors
Fear not, right-brained friends: Science and art intersect in plenty of places, and this is one of them. Samuel Taylor Coleridge lends a hand as we explore cryogenics - how to get things fantastically frigid - and the fascinating element...
National High Magnetic Field Laboratory
Magnet Academy: Wheatstone Bridge
This circuit is most commonly used to determine the value of an unknown resistance to an electrical current.
National High Magnetic Field Laboratory
Magnet Academy: Voltaic Pile
Italian scientist Alessandro Volta was the first to recognize key principles of electrochemistry, and applied those principles to the creation of the first battery, a simple tool which came to be known as the voltaic pile.
National High Magnetic Field Laboratory
Magnet Academy: Van De Graaff Generator
Invented around 1930, the Van de Graaff generator is a popular tool for teaching the principles of electrostatics. Others just call it "that thing that makes your hair stand on end." See how it works here.
National High Magnetic Field Laboratory
Magnet Academy: Transmission Lines
Electricity goes through some ups and downs on its way from the power plant to your house. See how it works in this interactive activity.
National High Magnetic Field Laboratory
Magnet Academy: Transformers
Use this interactive, simple transformer to make a complete circuit via induction using two separate coils with iron cores inside.
National High Magnetic Field Laboratory
Magnet Academy: Apple Ii Plus 1979
Long before the iPhone, the iPod or even the Mac, there was the Apple.