Electrical System
What is an electrical system?
Is made up of...
Electricity is a form of energy
Path where electricity flows is the electric circuit
Examples of equipment that require electricity to work
Toaster
Oven
Electric Iron
Hairdryer
Lamp
Television
Computer
Energy Source (Battery)
Wires
Switch
Bulb
Has a positive and negative end
Two poles of the battery connected -> Closed Electric Circuit
Usually made of copper
Wires are covered with materials like plastic or rubber
Electric current flows through wires
Allows electric current to pass through
Prevents electric current from leaking out of the circuit
Does not allow electric current to pass through easily
Controls the flow of electric current in a circuit
Either breaks or completes an electric circuit
Switch is open
Switch is closed
A gap or break in the electric circuit
Circuit is complete
Electric component
Consists of
Glass Bulb
Wire
Metal Casing
Filament (tungsten)
Metal Tip
Prevents filament from being damaged
Connects filament to metal tip and metal casing
Connected to other components of the electric circuit
Gives off light and heat when electric current passes through
Connected to other components of the electric circuit
How does electric current flow in a circuit
Closed and Open Circuits
Series and Parallel Circuits
Closed Circuit
Electric current can flow
Open Circuit
Electric current cannot flow
Series Circuit
Only one path for electric current to flow through
Parallel Circuit
More than one path for electric current to flow through
Electrical Conductors and Insulators
Electric Conductors
Electrical Insulators
Good Conductors of electricity
Made of most metals
Gold
Silver
Copper
Made of some liquids
Salt solution
Mercury
Generally good conductors of heat
Non-conductors of electricity
Made of most non-metal
Plastic
Wood
Clay
Glass
Air
Cloth
Paper
Cotton
Prevents electric shocks
