1. Electromagnetic Induction
SPI 0807:12.1
Electromagnetic Induction
Bell Work
Science
Thursday, February 23, 2017
Where is the Magnetic North pole located?
What three components make up an Electromagnet?
What is an electromagnet?
How do you increase the strength of an electromagnet?
What are the two benefits of an electromagnet versus a permanent magnet?

2. Notes Science Tennessee SPI Objective:
Electromagnetic Induction
Notes
Science
Tennessee SPI Objective:
Recognize that electricity can be produced using a magnet and wire coil.
Essential Question(s)
1) How is electricity produced with a magnet and a
coil of wire?
2) How do I make a simple generator?
I Can Statement
I can explain how to make electricity using a magnet and a wire coil.
Success Criteria
I can prove that I understand this topic by drawing a simple generator.

3. Simple Electrical Generator
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
(Solenoid)
Bar Magnet

4. Electromagnetic induction
The magnet has to move through the coil
… or the coil has to move through the magnet
Simple Electrical Generator
Here is the magnet
Galvanometer
Here is the solenoid
(coil of wire)
Here is a Galvanometer
(measures electric current and direction of the current)
Solenoid
The bar magnet is pushed back and forth
through the solenoid
Magnet

5. How It Works All magnets have an invisible magnetic force field.
The bar magnet is pushed back and forth
through the solenoid
Simple Electrical Generator
The magnetic force field pushes the electrons from atom to atom in the wire creating electrical current.

6. Look at the two generators shown below
Generators convert mechanical energy into electrical energy
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
Picture 02
(It works either way)
Picture 01

7. Rotational Generators
(very common)
Note: the magnet is stationary and the wire coil is rotating.
It also works if the wire is stationary and the magnet is moving
Rotational Generator
Magnet
Magnet
Wire Coil

8. 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

9. 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

10. Two Ways to Increase the Electrical Current
(1) Move the magnet faster
(2) Add more coils of wire

11. Brainpop Video Notes Science
SPI 0807:12.1
Electromagnetic Induction
Science
Brainpop Video
View the video titled "Electromagnetic Induction”
Link: Brainpop Website
Duration: 2 min 25 sec
User name: (ask your teacher for the user name)
Password: (ask your teacher for the password)
Task 01: Write down five things that catch your attention as
you watch this video.
Task 02: Complete the Brainpop quiz.

12. Science Questions SPI 0807.12.1 Electromagnetic Induction
Here is a question you might see on a quiz or test.

13. Science Questions SPI 0807.12.1 Electromagnetic Induction
Here is a question you might see on a quiz or test.

14. Science Questions SPI 0807.12.1 Electromagnetic Induction
Here is a question you might see on a quiz or test.

15. Science Questions SPI 0807.12.1 Electromagnetic Induction
Here is a question you might see on a quiz or test.

16. Science Questions SPI 0807.12.1 Electromagnetic Induction
Here is a question you might see on a quiz or test.

17. List the three parts of an electromagnet.
Assignment
SPI
Exit Ticket
What is the difference between a permanent magnet and an electromagnet?
What is the difference between an Electromagnet and Electromagnetic Induction?
List the three parts of an electromagnet.
What does Earth’s magnetosphere do?