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Ohm's law

Basics of electrostatics and properties of electricity. Ohm's Law and basic circuitry used to see the effect of resistance on current.

http://zebu.uoregon.edu/nsf/circuit.html

Ohm's Law

Explanation of Ohm's law, the relationship between voltage, resistance and current intensity . Includes a calculator for solving basic problems.

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ohmlaw.html#c1

Doping Of Semiconductors

The addition of a small percentage of foreign atoms in the regular crystal lattice of silicon or germanium produces dramatic changes in their electrical properties.

http://hyperphysics.phy-astr.gsu.edu/hbase/solids/dope.html#c1

A picture of a circuit in which you can change the resistance and voltage. You can see the result of your adjustment on a digital voltmeter, and millimeter. Includes a statement and description of ...

http://micro.magnet.fsu.edu/electromag/java/ohmslaw/

How headphones work

How do headphones turn an electrical signal into sound. Find out how and have a look inside an earphone.

http://www.explainthatstuff.com/headphones.html

Microphone

Microphones are transducers which detect sound signals and produce an electrical image of the sound

http://hyperphysics.phy-astr.gsu.edu/hbase/audio/mic.html#c1

The Resistor Guide

A complete reference about electrical resistors. This site contains information and facts about resistors, varistors, potentiometers, thermistors and more

http://www.resistorguide.com

Articles on electricity

A thorough and passionate clarification of the many misconceptions in electrical study which arise at school. Ideal for non-specialist staff who are not too sure what "electricity" actually is.