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What is current, voltage, and resistance?
What is current, voltage, and resistance?
Before we get started working with circuits, we first have to ask:
How does electricity work?
As magical as electricity may seem, this invisible thing that powers our world is really just a collection of charges flowing from one area to another.
If you’ve ever shocked yourself by touching a door handle, you’ve created electricity! That type of electricity is called Static Electricity and it results when you charge a group of electrons. You can do this by friction, like when you slide your feet across the carpet. When you touch the door handle, you transfer those charges, which results in a shock!
The type of electricity that we’ll be looking at is more controlled and runs through a circuit, which is why we’re able to use it in so many ways. A circuit is a pathway where charges are able to flow freely. There are two types of circuits:
- Complete Circuits – Complete circuits are pathways that have a continuous pathway. There are no breaks in the pathway, which allows electricity to flow into objects like lights and phone batteries.
- Open Circuits – Open circuits are pathways that are not continuous. Pathways may not be continuous because a wire became disconnected or a component on the circuit is broken. Breaks in the pathway do not allow for the flow of electricity.
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