Science: Electricity and electro magnetism

­What do a wrecking yard, a rock concert and your front door have in common? They each use electromagnets, devices that create a magnetic field through the application of electricity.

Dr. Raymond Damadian, a physician and scientist, toiled for years trying to produce a machine that could noninvasively scan the body with the use of magnets. Along with some graduate students, he constructed a superconducting magnet and fashioned a coil of antenna wires. Since no one wanted to be the first one in this contraption, Damadian volunteered to be the first patient.

Steps you through the process - lots of ads on the pages however!

This links you to a 7 minute Khan Academy video on how to make your own electric motor.

Interactive demonstrations explore the laws of magnetism and how electricity works. See how a resistor, capacitor, or inductor changes the voltage and amperage of an alternating current. A sparking electrical arc bridges the gap between conducting electrode in a powerful arc lamp. Barlow's wheel was an early electric motor. Discover the difference between a capacitor and a battery. Examine how an electronic circuit can measure the velocity of a bullet. Dozens of tutorials investigate magnetic fields, electrical forces, and circuits.

A Wikipedia homepage for all things electric

Wikipedia's younger sister - Simple Wikipedia is sometimes easier to understand - especially in the sciences!

Good cross section of types of eyes

A simplified explanation of light

Quite a complex entry. Try the Simple Wikipedia Sound page for a simpler entry.

Easier to understand version of Wikipedia