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? Check for Understanding A) Create a diagram that demonstrates the connection between electricity and magnetism. B) Use magnets and wire to build a simple generator.

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

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

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.

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

Electromagnetic Induction Notes SPI 0807:12.1 Electromagnetic Induction Science Note: 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 Magnet Magnet Wire Coil

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

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

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.

Science Questions SPI 0807:12.1 Electromagnetic Induction Here is a question you might see on a quiz or test.

Science Questions SPI 0807:12.1 Electromagnetic Induction Here is a question you might see on a quiz or test.

Science Questions SPI 0807:12.1 Electromagnetic Induction Here is a question you might see on a quiz or test.

Science Questions SPI 0807:12.1 Electromagnetic Induction Here is a question you might see on a quiz or test.

Science Questions SPI 0807:12.1 Electromagnetic Induction Here is a question you might see on a quiz or test.