How electric circuits work

Electric circuits

Find out what an electric circuit needs to work
How electric circuits work

An electric circuit needs two things so that it can work:

  • a power source
  • to be complete
 

This means that the wires connecting all the objects (switches, light-bulbs, buzzers and so on), must start and end at the power source before it can work.

That's why batteries have a top and bottom (+ and -), so they can carry the charge all the way round.