6th Grade Ch 3 Sec 1 What Is Electromagnetism

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  • 1. Ch. 3 Sec. 1 What is electromagnetism?
  • 2. electromagnetism
    • relationship between electricity & magnetism
    • electric current produces magnetic field
  • 3.  
  • 4. Magnetic Field Map Iron filings show the magnetic field lines around a wire with a current. What is the shape of the field lines?
  • 5.  
  • 6. solenoid
    • coil of wire w/ current
    • strength of magnetic field increases as # of loops (coils) increase
  • 7. The magnetic field around a solenoid resembles that of a bar magnet.
  • 8. electromagnet
    • solenoid w/ ferromagnetic core
    • strong magnet that can be turned on & off
  • 9. Electromagnets [02:16]
  • 10. ways to increase strength of electromagnets Online Interactive Activity-Make an electromagnet 4. Use stronger ferromagnetic material for core 3. Wind coils closer together 2. Add more loops of wire 1. Increase current
  • 11. electromagnets at work
  • 12. Olivia's Challenge: Build Your Own Electromagnet [00:24]
  • 13.  
  • 14. Make an electromagnet
    • How many paper clips will your electromagnet hold?
    • Can you hang paper clips on both ends of the nail?
    • How can you make your electromagnet stronger?
    • After using the electromagnet, remove the iron nail. Can the nail still pick things up? If so, why?
  • 15. Additional experiments to try:
    • Change the shape of the armature (coil of wire)
    • Hold the magnet above the coil.