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Voltage Divider

The two resistor voltage divider is used often to supply a voltage different from that of an available battery or power supply. In application the output voltage depends upon the resistance of the ...

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

Voltage

Voltage is electric potential energy per unit charge, measured in joules per coulomb ( = volts).

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

Voltage Circuit Simulator

This exercise will help you determine the relationship between voltage (V), amperage (I) and resistance (R). This relationship is called Ohm's Law

http://jersey.uoregon.edu/vlab/Voltage/

Voltage Law

The voltage changes around any closed loop must sum to zero.

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ohmlaw.html#c2

Faraday's Law

Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil. No matter how the change is produced, the voltage will be generated.

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

Kelvin's Thunderstorm

This site describes how falling water can be used to generate high voltages

http://www.amasci.com/emotor/kelvin.html

Voltage and current

A good explanation of what are current and voltage?

http://electronicsclub.info/voltage.htm

The Hall Effect

Mathematics of Hall voltages and measurement of sheet density and mobility of charge carriers.

http://www.eeel.nist.gov/812/effe.htm

Ernest Orlando Lawrence

Ernest Orlando Lawrence (1901 - 1958) invented the cyclotron, a device for accelerating nuclear particles to very high velocities without the use of high voltages.