Magnetism

  • Due Nov 17, 2016 at 8:59am
  • Points 2
  • Questions 2
  • Available until Nov 17, 2016 at 8:59am
  • Time Limit None
  • Allowed Attempts Unlimited

Instructions

Watch the following video lecture segment:

http://youtu.be/jJZaKkcHgT8

[PDF of Slides]

Summary:

• Most metals cannot be magnetized.
• Ferromagnetic metals, such as iron, can be magnetized by a magnetic field.
• Opposite poles (N & S) of magnets attract; like poles (N & N or S & S) repel.
• Magnetism may be removed by heating.
• Electric currents produce magnetic fields, as with an electromagnet.
• Earth’s core acts as an electromagnet.
• An electric motor uses electromagnets to create the force that turns the motor’s axel.

Have a question? Go here.  

Optional: Watch this Making of ... video from an episode of Breaking Bad:

https://www.youtube.com/watch?v=zsVOa2scltU

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