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Electric circuits
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Torch photo
Picture 1. A torch uses a simple circuit with a lamp, a battery, a switch and some wires. You can switch the lamp on by pressing the switch.
You can put a light on at the flick of a switch - either in a torch or using mains electricity. In both cases, the light is part of an electric circuit.

In this electronic resource (e-source), you can find out about simple circuits (like a torch) as well as more involved circuits with more than one light.
Build your own circuits
Each page has at least one circuit challenge. This allows you to build your own circuit to solve a problem. You can also try all the circuits together by clicking on the button at the top of the page.

To build these circuits, you will need the latest version of the Flash plug-in for your browser. This is available from the Macromedia website.
The e-source is split into 3 chapters:
  1. Basic circuits
  2. Series and parallel
  3. Circuit challenges

Using this e-source
There are a number of interactive features in this e-source:

A glossary of terms: any word with a glossary entry is highlighted like that. Clicking on the word will open a new window with a definition of that word.

Quick questions: at the end of each page is a quick question to test your understanding of that page. Type in your own answer then click on the button to see how well you did.

Roll over diagrams: many of the diagrams have highlights or sequences. You can see these by rolling your cursor over part of the picture or part of the text. The text has a roll over highlight like that.

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