Electricity OA3.1 Understandin g electricity and magnetism.
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Electricity OA3.1 Understandin g electricity and magnetism
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Transcript of Electricity OA3.1 Understandin g electricity and magnetism.
Electricity
OA3.1 Understanding electricity and
magnetism
Electricity Warm Up1. What is an electrical
insulator? List an example.
2. What is an electrical conductor? List an example.
3. True or False: “A positive object gained electrons.”
Vocab word
An unbroken, circular path where electricity flows
1. Circuit
(means circular)
Definition
Picture
Includes a source of energy – such as a battery
Vocab word
A circuit with a switch that is turned on.
2. Closed circuit
Definition
Picture
There is no gap in the circuit and electricity can flows
This closed electrical circuit connects a battery to a light.
Vocab word
A circuit with a switch that is turned off (or is open).
3. Open circuit
Definition
Picture
There is a gap in the circuit and electricity can’t flow
The circuit is OFF.
Switch that is open….electricity will not flow to light
Open circuit
Vocab word
A circuit that has only one path for the current.
4. Series circuit
Definition
Picture
If the circuit breaks, all devices using the circuit will fail.
series circuit…one path for electricity!
One path!
Vocab word
A circuit that has more than one path for the current.
5. Parallel circuit
Definition
Picture
If the circuit is broken the current may pass through other pathways and other devices will continue to work.
Parallel circuit: multiple pathways for electricity!
Vocab word
A weak link in an electrical circuit – will break the circuit if there is too much electricity
6. Fuse
Definition
Picture
Helps prevent circuit from having too much electricity (which can start fires)
Fuse box
How is household wiring arranged?
Most household wiring is logically designed with a combination of parallel circuits. Electrical energy enters the home usually at a breaker box or fuse box and distributes the electricity through multiple circuits. A breaker box or fuse box is a safety feature which will open
Closure questions :1. What shape do all circuits have?2. What does a switch do?3. Is the circuit below a closed or open circuit?
Why?
