Essential question what is magnetism and how does it relate to electricity
This presentation is the property of its rightful owner.
Sponsored Links
1 / 20

Magnetism Chapter 21 PowerPoint PPT Presentation


  • 100 Views
  • Uploaded on
  • Presentation posted in: General

Essential Question- What is magnetism and how does it relate to electricity?. Magnetism Chapter 21. Vocabula ry. Magnetic Domain Magnetic Field Magnetosphere Alternating Current Aurora. Direct Current Electromagnet Generator Motor Transformer. How magnets work.

Download Presentation

Magnetism Chapter 21

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Essential question what is magnetism and how does it relate to electricity

Essential Question-What is magnetism and how does it relate to electricity?

MagnetismChapter 21


Vocabula ry

Vocabulary

  • Magnetic Domain

  • Magnetic Field

  • Magnetosphere

  • Alternating Current

  • Aurora


Magnetism chapter 21

  • Direct Current

  • Electromagnet

  • Generator

  • Motor

  • Transformer


How magnets work

How magnets work.

Magnetic field-a space around a magnet where the magnetic force is active.

Magnetic Domain-a group of atoms with their magnetic fields pointing in the same direction.


Magnetosphere the space affected by the earth s magnetic field

Magnetosphere- the space affected by the Earth’s magnetic field.


The sun and the earth s magnetosphere

The Sun and the Earth’s magnetosphere.

Charged particles

Aurora-the light given off from the sun’s charged particles crashing into atoms in the Earth’s atmosphere.


Natures magnets

Natures Magnets

Monarch Butterflies

Homing Pigeons

Migratory Birds

The Lodestone- the original natural magnet

Examples of Biomagnetism


Early uses of magnetism

Early Uses of Magnetism

  • The Compass

  • The needle will point North and South

  • Turn the compass so that they line up


Electromagnet a wire with current flowing through it that is wrapped around an iron core

Electromagnet- a wire with current flowing through it that is wrapped around an iron core.

How do they work?


Uses for electromagnets

Uses for Electromagnets

  • Televisions/ Computer- CRT screens

  • Automobiles- ignition, starter motor, automatic doors

  • Motors

  • Sound/ Speakers-An electromagnet draws the speaker diaphragm, allowing the music to be played.

  • Scrap yards-In scrap yards, electromagnets lift cars and other magnetic objects.

  • Fire Doors and Automatic Doors

  • Relays/ Switches

  • Sorting MetalsRead more: 10 Uses for an Electromagnet | eHow.co.ukhttp://www.ehow.co.uk/list_5908429_10-uses-electromagnet.html#ixzz1hm19hFDy


Magnetism chapter 21

Electric Motors- any machine that changes electric energy into kinetic energy. http://www.arthursclipart.org/engineer/engineer/electric%20motor.gif

What is a motor?

How does it keep running?


Electric current the flow of electric charge

Direct Current (DC)-

A current in which electrons only flow in one direction. (used in battery powered electronics.

Electric Current- the flow of electric charge.

Alternating Current (AC)-

a current that changes direction. (used in plug in electronics)


Http sustainableconsciousnessnetwork wordpress com

Electric Generator

- uses magnets to convert motion energy to electricity

http://sustainableconsciousnessnetwork.wordpress.com/


Magnets are used in machines to create and change current

Magnets are used in machines to create and change current

Power Plants contain Electric Generators, machines that use a magnetic field to turn motion into electricity

Transformer- a machine that changes the voltage of an alternating current without losing much energy.


Magnetism chapter 21

Superconductors - metals at extremely low temperatures have next to no resistance so next to no loss of energy as heat.

http://www.telegraph.co.uk/science/large-hadron-collider/7829090/The-God-particle-may-exist-in-five-forms-Large-Hadron-Colliders-rival-project-finds.html

http://www.chemistryexplained.com/St-Te/Superconductors.html

A magnet floats above a superconductor

Particle accelerators use superconductors to get particles up to nearly the speed of light,


Magnetic resonance imaging mri

Magnetic Resonance Imaging (MRI)

MRI Scanner

MRI Image

http://greglw.blogspot.com/1971/01/item-04-mri-scanner-magnetic-resonance.html


Ferromagnet

Ferromagnet

  • Ferromagnet- A permanent magnet made from a material such as iron. Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets.

  • The shape of a ferromagnet is not important


Electromagnet vs natural magnets

Natural magnet (lodestone)

Electromagnet vs. Natural Magnets

Electromagnet


Specific shapes of magnets

Specific shapes of magnets

  • Bar magnet

  • Horseshoe magnet

Disk Magnet


Magnetism chapter 21

  • bar magnet

  • horseshoe magnet

  • disk magnet

  • magnetic

  • copper

  • repel

  • ferromagnetic

  • aluminum

  • pole

  • iron

  • nickel

  • attract

  • core


  • Login