Edited by Jamie (ScienceAid Editor), Taylor (ScienceAid Editor)

Definition of Current

In a solid metal conductor, current is the flow of free electrons (negatively charged), which move from negative to positive, creating an overall movement of charge in this direction. In molten or dissolved electrolytes, it is the flow of negative ions (anions) toward the positive terminal and vice versa. For more about this see electrolysis in the chemistry section

Was this helpful? Yes | No| I need help


There are two types of current.

  1. 1
    Alternating current (AC)
    An alternating current constantly changes direction. This is the kind of current used for most domestic electricity.
    Was this step helpful? Yes | No| I need help
  2. 2
    Direct current (DC)
    A direct current passes in the same direction constantly. This is used to power electrified railway lines such as the London Underground.
    Was this step helpful? Yes | No| I need help

Referencing this Article

If you need to reference this article in your work, you can copy-paste the following depending on your required format:

APA (American Psychological Association)
Current. (2017). In ScienceAid. Retrieved Sep 24, 2023, from

MLA (Modern Language Association) "Current." ScienceAid, Accessed 24 Sep 2023.

Chicago / Turabian "Current." Accessed Sep 24, 2023.

If you have problems with any of the steps in this article, please ask a question for more help, or post in the comments section below.


ScienceAid welcomes all comments. If you do not want to be anonymous, register or log in. It is free.

Article Info

Categories : Electricity

Recent edits by: Jamie (ScienceAid Editor)

Share this Article:

Thanks to all authors for creating a page that has been read 95 times.


Thank Our Volunteer Authors.

Would you like to give back to the community by fixing a spelling mistake? Yes | No