What is a Coulomb?

By: Dusty Arlia
Published on December 11, 2011
Last Updated on Saturday, July 18, 2015 at 2:19 PM
Total Updates: 4

A coulomb is a SI unit of electric charge. The coulomb is uses the letter C as its symbol. It is the charge transported by a steady current of one ampere in one second:
1C = 1A x 1s

One coulomb is also the amount of excess charge on the positive side of a capacitance of one farad charged to a potential difference of one volt:
1C = 1F x 1V