Transcript Notes-Electromagnetic Induction

Notes
SPI 0807:12.1
Electromagnetic Induction
Science
Tennessee SPI Objective:
Recognize that electricity
can be produced using a
Instructions
1) First click
"View"
magnet
and on
wire
coil.from the top-menu bar.
2) Then click on "Slide Show" from the drop-down menu.
3) Then use theCheck
right-arrow
button on your keyboard to
for Understanding
advanceathrough
thisto
presentation.
Create
diagram
explain the relationship
between electricity and magnetism.
Essential Question(s)
How is electricity produced with a magnet and a
coil of wire?
Notes
SPI 0807:12.1
Electromagnetic Induction
Science
Key Ideas and Terms

Magnets and a coil of wire can induce (create) electricity

This process is called electromagnetic induction

Note: another name for electricity is electrical current

Note: another name for a coil of wire is a solenoid
Simple Electrical Generator
Coil of Wire
Bar Magnet
Notes

SPI 0807:12.1
Science
Here
is
a
diagram
of
Electromagnetic Induction
electromagnetic induction
The magnet has to move through the coil
Or…the coil has to move through the magnet
Here is the magnet
Here is the solenoid
(coil of wire)
Here is a Galvanometer
(measures electric current
and direction of the current)
The bar magnet is pushed
back and forth
through the solenoid
How It Works
All magnets have an invisible
magnetic force field.
Simple Electrical Generator
The bar magnet is
pushed back and forth
through the solenoid
The magnetic force field pushes
the electrons from atom to
atom in the wire creating
electrical current.
Look at the two
generators
SPI
0807:12.1 shown below
Science
Notes
Generators convert
mechanical energy
into electrical energy
Electromagnetic
Induction

Both diagrams are showing electromagnetic induction
Note: in picture 01 the wire coil is stationary and the magnet is
moving back and forth
Note: in picture 02 the magnet is stationary and the wire coil
is rotating (It works either way)
Picture 01
Picture 02
Notes
SPI 0807:12.1
Electromagnetic Induction
Science
Note: in this diagram, the magnet is stationary and the wire coil is
rotating.
It also works if the wire is stationary and the magnet is moving
Simple Electrical Generator
F.Y.I.-Electromagnetic Induction
…is how most electricity is generated around the world.
These power plants all use magnets and coils of wire to make electricity
Nuclear Power Plant
Wind Turbines
Coal Power Plant
Hydroelectric Dam
F.Y.I.-Electromagnetic Induction
…is how most electricity is generated in cars, trains, boats, & planes
Each of these machines has a generator inside that creates electricity
Electrical Generator
(Alternator)
Consists of a
magnet rotating
through a
coil of wire
Notes
SPI 0807:12.1
Electromagnetic Induction
Science
Two Ways to Increase the Electrical Current
(1) Move the magnet faster
(2) Add more coils of wire
Questions
SPI 0807:12.1
Electromagnetic Induction
Science
Here is an example of a question you might see on a quiz or test.
Questions
SPI 0807:12.1
Electromagnetic Induction
Science
Here is an example of a question you might see on a quiz or test.
Questions
SPI 0807:12.1
Electromagnetic Induction
Science
Here is an example of a question you might see on a quiz or test.
Questions
SPI 0807:12.1
Electromagnetic Induction
Science
Here is an example of a question you might see on a quiz or test.
Questions
SPI 0807:12.1
Electromagnetic Induction
Science
Here is an example of a question you might see on a quiz or test.
Notes
SPI 0807:12.1
Electromagnetic Induction
Science
Brainpop Video
View the Brainpop video titled "Electricity”
Link: Brainpop Website
User name: ----- (ask your teacher for the user name)
Password: ----- (ask your teacher for the user name)
Task 01: Write down five things that catch your attention as
your watch this video
Task 02: Complete the Brainpop quiz