Complete Circuits
Science: Year 3 & 4 National Curriculum, topic 10.3.2
Complete Circuits
Electricity can only flow around a circuit if the circuit is complete. A complete circuit has no break in the wire in the circuit.
A circuit with a lamp
- The lamp will be on while the circuit is complete.
- The lamp will only turn off when the circuit is broken.
Switches
- A switch is a component (part of a circuit) that breaks a circuit.
- Switches can be used to break a circuit to turn off the lights in your home.
- Switches can also be used to reconnect the circuit and turn on the lights in your home.
Test yourself on Complete Circuits
What is the role of a switch in a circuit?
Which of these are correct about circuits?
Which is a switch in a circuit?