Difference between revisions of "Current"
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'''Current''' is typically measured in the [[SI]] unit of Amperes (<tt>A</tt>), often referred to as "amps". <tt>1 A = 1 [[Coulomb]]/[[second]]</tt> | '''Current''' is typically measured in the [[SI]] unit of Amperes (<tt>A</tt>), often referred to as "amps". <tt>1 A = 1 [[Coulomb]]/[[second]]</tt> | ||
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| + | Direct current ([[DC]]) has a zero [[frequency]]. Alternating current ([[AC]]) has a non-zero frequency. | ||
== References == | == References == | ||
{{reflist}} | {{reflist}} | ||
[[category:Electricity]] | [[category:Electricity]] | ||
Revision as of 19:20, August 8, 2011
Current is the amount of electrical charge flowing through an object, or through an electric circuit, at a given moment[1]. While moving charge is normally carried by electrons, positive current is measured in the opposite direction from the flow of electrons, since electrons have a negative charge.
Different objects have different resistance. An object with high resistance, called an insulator, will have a lower current flowing through it. An object with low resistance, called a conductor, will have a higher current flowing through it.
Current is typically measured in the SI unit of Amperes (A), often referred to as "amps". 1 A = 1 Coulomb/second
Direct current (DC) has a zero frequency. Alternating current (AC) has a non-zero frequency.
References
- ↑ Wile, Dr. Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000