# Introduction to Circuits

## Learn a bit about circuits – wonderful things that help us do many things in the world.

Image via Wikipedia

1. What is a circuit?

A circuit is a never-ending looped pathway for electrons. If we take a wire, or many wires joined end-to-end, and loop it around so that it forms a continuous pathway, we have the means to support a uniform flow of electrons without having to resort to infinite sources and destinations

2. How does it work?                                                                                                                                                  An electric circuit needs two things to work:

1. A power source

2. To be complete                                                                                                                                                                                            This means that the wires connecting all the objects (switches, light-bulbs, buzzers, etc.) must start and end at the power source. Because of this, batteries have a top and bottom (+ and -) so they can carry the charge (the current) all the way around.

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