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EQ: How are electricity and magnetism related and how does it affect our every day life?

ELECTRICITY + MAGNETISM = Electromagnetism. PG. 79. EQ: How are electricity and magnetism related and how does it affect our every day life? PG. 79. MAGNETISM. ELECTRICITY. The movement of electrons from one place to another.

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EQ: How are electricity and magnetism related and how does it affect our every day life?

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  1. ELECTRICITY + MAGNETISM = Electromagnetism PG. 79 EQ: How are electricity and magnetism related and how does it affect our every day life? PG. 79

  2. MAGNETISM ELECTRICITY The movement of electrons from one place to another A material that has aligned domains with repulsive and attractive forces

  3. ELECTRICITY MAGNETISM Electric currents cause magnetism • How can you tell?Compass needle moves when near electrical current - creating a magnetic field

  4. ELECTROMAGNET A temporary magnet made by wrapping a wire coil carrying an electric current around an iron core. How to increase the strength of the magnet • More coils of wire= more current • Increase voltage • Add iron to the core https://www.youtube.com/watch?v=lSmuqLtmuwg Junkyard electromagnet

  5. Electromagnets • 3. Solenoid - A single wire wrapped into a cylindrical wire coil • 4. Solenoid with iron core Increasing the strength of the magnetic field (1-weakest, 4 –strongest) • Straight wire • 2. Single loop

  6. Electromagnets • Electric motors are used in most household appliances which convert electricity into mechanical energy (motion).

  7. How does an electric motor work?

  8. How does an electric motor work? Go to the next slide 

  9. How does an electric motor work? Simple as that!! How a speaker works https://www.youtube.com/watch?v=DMxn3CPLe-A

  10. MAGNETISM  ELECTRICITY Moving magnet can generate electricity • How can you tell? Electromagnetic induction moving a magnet in and out of a coiled wire created an electrical current without a battery https://www.youtube.com/watch?v=AmWEs5CTQ3Q https://www.youtube.com/watch?v=20Vb6hlLQSg Electricity generation https://www.youtube.com/watch?v=hajIIGHPeuU

  11. electromagnetic induction Electricity can produce a magnetic field, but a magnetic field can also produce electricity! How? Moving a loop of wire through a magnetic field or moving a magnet through a loop of wire produces an electric current. https://www.youtube.com/watch?v=S3Qwf4P6x9w Flashlight https://www.youtube.com/watch?v=NqdOyxJZj0U Pipe and magnet

  12. A generator is used to convert mechanical energy into electrical energy by electromagnetic induction.

  13. Dilbert

  14. Maglev Trains • Maglev trains are the new way to travel. It uses both magnets and electricity to cause a train to “levitate” above the track (and reduce the resistance of friction). • Video: • https://www.youtube.com/watch?v=iaElPV0FWJ0

  15. Changing Voltage • Transformers work by the ratio of coils to change voltage: • Changing magnetic field strength: If you have more coilson the output side than the input side, then you increase voltage. If you have less coilson the output side, then you decrease voltage. • Video: • https://www.youtube.com/watch?v=YQQ-mgjCpn8

  16. SUMMARY OF E & M E = Electricity and M = Magnetism are related!! • Both can cause each other • Likes repel • Opposites attract ELECTRICITY • Can be + or - • Can flow (current) • Can jump (static) MAGNETISM • Can NOT have only 1 pole • Can be Normal (N) or Reversed (S) pole • Can move through field • Causes sun spots, flares, CME

  17. Closing Task • Differentiate between an electromagnet and electromagnetic induction. How are both used in your every day lives

  18. An electric motor is a device which converts electricity to mechanical energy. • An electromagnet turns inside of a permanent magnet. By changing the direction of the current, the poles will keep switching between N and S, and therefore cause the electromagnet to continually rotate. • Electric generatorsdo just the opposite. They convert mechanical energy into electricity. • They do this through a process of electromagnetic induction. This is where an electric current is generated by manually varying a magnetic field. https://www.youtube.com/watch?v=d_aTC0iKO68

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