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