Energy and change, Systems and control (Term 3)
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What is a Battery?
Two or more cells connected to provide electrical energy.
What is insulation?
Covering on circuit wires that keep the electric current in the wires, also to prevent you from being shocked.
What is a conductor?
A material that allows an electric current to flow through it.
What is a buzzer?
An electric device that converts electrical energy into sound energy.
What is a cell?
A source of electrical energy that stores and then supplies energy to a circuit.
What is an electric motor?
An electric device that converts electrical energy into movement energy.
What is an electric current?
The movement of an electric charge through a conductor.
What is an output?
Device component that changes electrical energy into another form of energy
What are components?
Parts of an electric circuit
What is a circuit diagram?
Diagram of an electric circuit using standard symbols for electric components
What is a switch
A component for controlling whether the current flows in an electrical circuit
Where does the device get its energy?
From a source
What are most electrical cables made of?
Copper
Give 3 examples of output energy
heat, sound, movement, light.
Why do we get electricity?
because all matter has positive and negative particles, same charge repels and opposite charges attract
A positive particle will ATTRACT/REPEL a negative particle.
ATTRACT
A negative particle will ATTRACT/REPEL another negative particle.
REPEL
Where does an electric charge come from?
An energy source such as a battery.
What does an electrical circuit consist of (mainly)?
• A source of energy • Conducting material • A device
What do we call electric charges that move through a closed loop (and continuous path)?
An electric circuit
Electricity needs a ___________ to flow.
Continuous path
What is the role of a circuit?
To send electricity from the source to the device.
What is the role of a device?
To change electrical energy into useful output energy.
What 3 things does an electric system mainly consist of?
An input source, a device and an output.