In this module, you will learn:

  • the various components in an electric circuit
  • about open and closed circuits
  • circuit symbols
  • series and parallel circuits

Resources to help you:

  • Textbook: page 81, 82, 83 and 84
  • Notebook: page 21, 22 and 23

Electric circuits

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When we connect different electrical component in a loop, we get an electric circuit.


There should be a power source like a battery, wires to connect them, and an appliance like the light bulb to complete a circuit. A switch can be added to control the bulb being on or off.

Source: https://www.youtube.com/watch?v=j0zf-otH3cY

Open vs Closed circuit


Open circuit


  • Switch is "off"
  • Circuit is not complete
  • Bulb will not light up.

Closed circuit


  • Switch is "on"
  • Circuit is complete
  • Bulb will light up.
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