World Health Organization
World Health Organization: International Emf Project
The World Health Organization probes into the feared associations between electromagnetic fields (EMFs) and cancer. Check out "What is EMF?" for detailed summaries on what electromagnetic fields are and the possible health effects, or...
TeachEngineering
Teach Engineering: Induced Emf in a Coil of Wire
Students use a simple set up consisting of a coil of wire and a magnet to visualize induced EMF. First, students move a coil of wire near a magnet and observe the voltage that results. They then experiment with moving the wire, magnet,...
National High Magnetic Field Laboratory
Magnet Academy: Emf in Inductors
Electromotive Force (EMF) and its sidekick, back EMF, are interesting electromagnetic phenomena that aren't really forces at all. (Java tutorial)
Science Education Resource Center at Carleton College
Serc: Modeling Emf, Potential Difference, and Internal Resistance
Interactive lecture discusses internal resistance which provides help to students in developing an accurate model.
CK-12 Foundation
Ck 12: Electromotive Force
[Free Registration/Login may be required to access all resource tools.] Explains what electromotive force, or EMF, is, and how to calculate the EMF of a moving wire in a magnetic field.
TeachEngineering
Teach Engineering: Changing Fields
This lesson plan begins with an activity in which students induce EMF in a coil of wire using magnetic fields. Then, demonstrations on Eddy currents show how a magnetic field can slow magnets just as Eddy currents are used to slow large...
Other
The Skeptic's Dictionary: Electromagnetic Fields (Em Fs)
This site explores what electromagnetic fields are, how they are caused, and their link (or lack thereof) to cancer.
Other
Quackwatch: Power Lines and Cancer Nothing to Fear
This site explores the history of power lines and cancer associations, as well as dispelling the myth. The science is explored by citing known facts, studies and experts in the field.
Georgia Department of Education
Ga Virtual Learning: Electromagnetic Induction
In this interactive tutorial students will learn about a magnetic flux, induced current and how to apply Lenz's Law.
Massachusetts Institute of Technology
Mit: Open Course Ware: Courses: Physics: Electricity and Magnetism
College-level physics course highlighting electromagnetism. This course also includes a wide variety of other physics topics including lightning, electrocardiograms, metal detectors, and atom smashers, to name a few. Course includes a...
National Institutes of Health
Niehs: Kids' Pages: What Are Electric and Magnetic Fields?
Informational fact sheet on electricity with emphasis on electric and magnetic fields.
CK-12 Foundation
Ck 12: Lenz's Law
[Free Registration/Login may be required to access all resource tools.] Lenz's law is explained and demonstrated. It states that a magnetic field is produced in opposition to an induced current.
US National Library of Medicine
Medline Plus: Electromagnetic Fields
This site provides links to a variety of government-sponsored overviews and articles on electromagnetic fields and their associated health risks.
University of Waterloo (Canada)
Computer Assisted Chem. Tutorial/chemistry of Batteries
A superb explanation of how a battery works. Discusses the associated chemistry which explains how a battery produces a voltage. Includes a series of "Confidence Building Questions."
CK-12 Foundation
Ck 12: Internal Resistance of a Battery
[Free Registration/Login may be required to access all resource tools.] Batteries have both an ideal internal voltage and a terminal voltage, which is less due to internal resistance. This lesson presents sample problems and a video...
University of Guelph
University of Guelph: Physics Tutorials: Ohm's Law
Explains Ohm's Law and some facts related to it.
Other
Wiki Lectures: Interactions of Electromagnetic Fields With Living Matter
Discusses the effects that exposure to electromagnetic fields have on living tissues and matter.
CK-12 Foundation
Ck 12: Generators and Motors
[Free Registration/Login may be required to access all resource tools.] This lesson explains how a generator and a motor work. Includes a simulation for exploring generators.
Other
Univ.of Delaware: Real Batteries and Battery Testers
A discussion of various principles related to voltage. The operation of battery testers and voltmeters are explained. The importance of the internal resistance of a power source is discussed.