Electric current

What Is Electric Current?

Electric current is the flow of tiny particles called charged particles. These particles can be electrons or other small bits that carry an electric charge. When they move through something like a wire, we call it electric current. It is what makes lights shine and machines work in our homes.

Electric current is measured in a unit called ampere, often shortened to "amp". One amp means one coulomb of charge moving each second. We use a tool called an ammeter to measure how strong the current is.

How Electric Current Works

When electric current flows, it can create magnetic fields. These invisible fields help power many things, like motors in toys and generators in power plants. In regular wires, electric current also makes heat. This is why incandescent light bulbs glow and shine.

There are two main types of electric current. Alternating current (AC) changes direction back and forth, like the electricity in most homes. Direct current (DC) flows in just one direction, like the power from batteries or solar cells.

Fun Facts About Electric Current

• Electric current can happen in nature, like during lightning or the beautiful lights we see in the sky called polar auroras.
• The symbol for electric current is I. This letter comes from a French phrase about "current intensity".
• Scientists use a special idea called conventional current to talk about the direction of the flow, even though the tiny particles moving are often electrons.

Electric current is all around us, helping to power the world we live in!