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178 bytes added, 03:51, October 9, 2007
'''Voltage''' is defined as the electric ''electrical potential '' between two points. In practical terms, the higher the voltage of a batterythat is, the more power it can supply[[potential energy]] difference between two points due to [[electrical charge]]<ref name="Schwarz">Schwarz, Stephen E. You can just barely taste the voltage of a 1and William G.5V battery, but a 9V batter will give your tongue a shock if you try thatOldham. Model car sets run on 18V''Electrical Engineering: An Introduction, and voltage over 60V can give you a lethal shock2e.'' Oxford University Press: 1993.</ref> Its unit is the [[volt]].
In [[alternating current]], An important point to note is that only the ''difference'' in potential for shock is lesshas any practical meaning, but 115V (AC) not the absolute value. As such, a ''ground'' can still give you quite be defined in a joltcircuit, which has a potential of 0 volts. It is used to  ==See Also==*[[Kirchoff's voltage law]]*[[Electrical power most household appliances in the U.S.]]*[[Conductance]]*[[Resistance]]*[[Current]] [[Category:Electrical Engineering]]