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Circuits (1)

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Title: Circuit symbols and simple circuits
Learning Objective: Today we are going to learn
about simple circuits.
Identify and draw circuit symbols
Construct simple circuits from a diagram
Drawa diagram from a set up circuit
Key words:
Bulb
Switch
Component
Symbol
Diagram
Circuit
Do Now
Write the date and title in your
books.
List 5 things that use electricity.
Explain how they work.
What is electricity?
Some particles carry an electric charge. In electric
wires these particles are electrons. We get an electric
current when these charged particles move from
place to place.
Electric current
An electric current is a flow of charge, and in a wire
this will be a flow of electrons. We need two things
for an electric current to flow:
1. Something to transfer energy to the electrons,
such as a battery or power pack
2. A complete path for the electrons to flow through
(an electric circuit)
Circuit component
• Circuits can have lots of different components.
It all depends on what their function is.
• We cant be expected to draw a copy of each
component every time we draw a circuit, so to
make things easier, we use symbols.
Draw me a bulb
Draw me a battery
Draw me a switch
Look at your drawings
• Are they the same as mine?
• Are they the same as your neighbours?
• WHY DO YOU THINK IT IS OMPORTANT THAT
DIAGRAMS ARE ALL THE SAME?
bulb
bulb
switch
switch
ammeter
ammeter
A
cell
cell
wire
wire
voltmeter
voltmeter
V
resistor
resistor
fuse
fuse
Now…
• How do I put these together into a diagram?
Becomes…
Circuit Diagrams
What are the advantages of drawing a circuit diagram
using symbols?
Drawing Circuits
1) A cell, a bulb and a
switch ‘in series’
What does ‘series’ mean?
2) A battery of
cells, a switch
twowith
bulbsthis
in circuit
What isand
wrong
series
diagram?
Task – Circuit Diagram Drawing
Task – Draw the circuit diagram for each of the
circuits detailed below.
2
1
3
4
5
Your turn
• Using the worksheets, try to make these
circuits.
• If you need help, ask a friend first.
• If you are really stuck then ask me!
How did we get on?
• Try to create your own circuits and draw them
in your books.
True or False?
I am the symbol for a bulb
B
True or False?
I am the symbol for a bulb
True or False?
I am the symbol for a cell
True or False?
I am the symbol for a
battery
True or False?
Electricity is a
Force
True or False?
Electricity is a type
of energy
True or False?
We use a voltmeter to
measure electrical
current
True or False?
This is the symbol for an
ammeter
a
True or False?
Electrical current gets
used up in a circuit
True or False?
Electrical current is the flow
of electrical charges
(electrons) around a circuit
True or False?
Homework
• Learn the circuit symbols and definitions for a
test next lesson.
Download
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