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