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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.


  1. Wile, Dr. Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000
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