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View Resource Electronics Simulations and Lessons

These are five free downloadable simulations for experimenting with and learning basic electronics concepts. The software includes a LED (Light Emitting Diode) Simulation which demonstrates band gap theory. The Overview Complex AC Circuit program allows users to adjust the voltage, load resistance, capacitance, and inductance and see the resulting change in the current. The DC Circuit Parallel...

View Resource How A Light Emitting Diode Works

This is a downloadable software simulation of light emitting diode simulation. It demonstrates band gap theory and shows how a single photon is created. Users can adjust the input voltage to allow the recombination of the electrons and holes. Note what happens to the photon when you adjust the band gap energy. This free program requires Windows 9x, NT, XP or later. Note that this will NOT run on...

View Resource Folding Paper Model of the Earth's Magnetosphere

This website, created by authors David P. Stern and Mauricio Peredo, provides instructions and an image which can be downloaded, printed on a regular page, copied by a xerox machine (preferably, onto stiff paper), cut and folded to produce a model of the Earth's magnetosphere. A supplement to "Exploration of the Earth's Magnetosphere" whose index page is linked at the beginning and the end of the...

View Resource Dynamos, Magnetic Reversals and Plate Tectonics

These pages, authored and curated by David P. Stern, describe a dynamo process that creates the magnetic fields of the Earth and the Sun. Flows of electrically conducting material through existing magnetic fields produces electric currents, which maintain the magnetic field. Dynamos in the Earth's core reverse their north-south polarity, a process recorded by sea-floor magnetization, which...

View Resource How Electrons Move: Activity

This resource provides an introductory activity on how electrons move. Core concepts include the discovery of the electron, electric forces and fields, how an electron moves in an electric field, designing an electric field, magnetic fields and how an electron moves in a magnetic field. The interactive module allows students to test their knowledge as they learn. The material would be best for...

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