CHANGING CIRCUIT CHANGING CIRCUIT GRADE 6
CHANGING CIRCUITCHANGING CIRCUITGRADE 6
Electricity can flow through the components in a complete electric circuit.
Incomplete circuitSo the electric current can’t flow
Complete circuitSo the electric current flow andLit the bulb
Electric symbolsElectric symbols
We use these symbols to draw diagrams of circuits:
Produce
Sound
Produce
Movement
Drawing circuit symbolsDrawing circuit symbols
SwitchesSwitches
When a switch is open (off), there is a gap in the circuit. Electricity cannot travel around the circuit.
When a switch is closed (on), it makes the circuit complete. Electricity can travel around the circuit.
Changing number of Changing number of batteries/cellsbatteries/cells
Adding more batteries to a simple circuit will increase the electrical energy, which will make a bulb brighter.
Changing number of Changing number of bulbsbulbs
Adding more bulbs to a simple circuit will make the bulbs dimmer.
Changing length of Changing length of wireswires Lengthening the wires in a simple
circuit will make the bulb dimmer.
Longer the wire the more the resistance so less electric current can flow and the bulb dimmer
Changing thickness of Changing thickness of wireswires
Thicker the wire in a simple circuit will make the bulb brighter.
Thicker the wire less the resistance so more electric current can flow
Electrical ConductorElectrical Conductor
All metal can conduct electricity but not all are good electrical conductor
One of the best conductor is copper thats why it commonly used for making wire
Copper
Plastic or rubber to insulate the electric current
Electrical insulatorElectrical insulator
Most of non metal can’t conduct electricity
One of non metal that can conduct electricity is graphite (pencil lead)
or carbon
If there is no electric insulator you will get If there is no electric insulator you will get electric shock when you touch itelectric shock when you touch it