An electric current flows when electric charges (usually electrons) move through a conductor like a metal wire.

Quick Scoop: Core Idea

In metals, there are many free electrons that are not tightly bound to any one atom.

When you connect a battery or power source, it creates an electric field in the wire that pushes these electrons so they start drifting in one general direction.

This organized motion of charge is what we call electric current.

So, for your exact question:

“An electric current flows when what move through a conductor?”
Answer: When electric charges (typically electrons) move through a conductor.

Tiny Breakdown (for intuition)

  • In metals: the moving charges are mainly electrons.
  • In some other materials (like solutions): positive and negative ions can both move and carry current.
  • Current is just “how much charge passes per second,” measured in amperes.

You can imagine a conductor like a crowded hallway: the people are the charges, and when they all start walking in one direction, that’s like an electric current flowing.

TL;DR:
An electric current flows when electric charges (usually electrons) move through a conductor.

Information gathered from public forums or data available on the internet and portrayed here.