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Notes Science
Essential Question(s)How is electricity produced with a magnet and acoil of wire?
Tennessee SPI Objective:Recognize that electricity can be produced using a magnet and wire coil.
Check for UnderstandingCreate a diagram to explain the relationshipbetween electricity and magnetism.
SPI 0807:12.1 Electromagnetic Induction
Instructions1) First click on "View" from the top-menu bar.2) Then click on "Slide Show" from the drop-down menu.3) Then use the right-arrow button on your keyboard to advance through this presentation.
Note: another name for electricity is electrical current
Notes
Key Ideas and Terms
This process is called electromagnetic induction
Note: another name for a coil of wire is a solenoid
Magnets and a coil of wire can induce (create) electricity
SPI 0807:12.1 Electromagnetic Induction
Science
Simple Electrical Generator
Coil of Wire
Bar Magnet
Notes
The magnet has to move through the coilOr…the coil has to move through the magnet
SPI 0807:12.1 Electromagnetic Induction
Science Here is a diagram of electromagnetic induction
Here is the solenoid (coil of wire)
Here is the magnet
Here is a Galvanometer(measures electric current
and direction of the current)
The bar magnet is pushed back and forth
through the solenoid
All magnets have an invisible magnetic force field.
The magnetic force field pushes the electrons from atom
to atom in the wire creating electrical current.
Simple Electrical Generator
How It Works
The bar magnet is pushed back and forth through the solenoid
Notes ScienceSPI 0807:12.1 Electromagnetic Induction
Note: in picture 01 the wire coil is stationary and the magnet is moving back and forth
Both diagrams are showing electromagnetic induction
Note: in picture 02 the magnet is stationary and the wire coil is rotating
Picture 02 Picture 01
Look at the two generators shown below Generators convert mechanical energy into electrical energy
(It works either way)
Notes SPI 0807:12.1 Electromagnetic Induction
Science
Simple Electrical Generator
Note: in this diagram, the magnet is stationary and the wire coil is rotating.
Magnet Magnet
Wire Coil
It also works if the wire is stationary and the magnet is moving
Nuclear Power Plant Wind Turbines
Hydroelectric DamCoal Power Plant
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
F.Y.I.-Electromagnetic Induction
…is how most electricity is generated in cars, trains, boats, & planes
Electrical Generator(Alternator)
Consists of a magnet rotating
through a coil of wire
Each of these machines has a generator inside that creates electricity
Notes
Two Ways to Increase the Electrical Current
ScienceSPI 0807:12.1 Electromagnetic Induction
(1) Move the magnet faster (2) Add more coils of wire
Here is an example of a question you might see on a quiz or test.
Questions ScienceSPI 0807:12.1 Electromagnetic Induction
Here is an example of a question you might see on a quiz or test.
Questions ScienceSPI 0807:12.1 Electromagnetic Induction
Here is an example of a question you might see on a quiz or test.
Questions ScienceSPI 0807:12.1 Electromagnetic Induction
Here is an example of a question you might see on a quiz or test.
Questions ScienceSPI 0807:12.1 Electromagnetic Induction
Here is an example of a question you might see on a quiz or test.
Questions ScienceSPI 0807:12.1 Electromagnetic Induction
Notes
Brainpop Video View the Brainpop video titled "Electricity”
Link: Brainpop WebsiteUser 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
ScienceSPI 0807:12.1 Electromagnetic Induction