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How are magnetic fields formed?

posted Apr 27, 2018, 11:14 AM by Barbara Fortunato
5: T 5/1, 7: M 4/30

Today, we'll learn how moving charges create magnetic fields.  We'll learn the last two right hand rules.  We'll see a couple of demonstrations with iron filings and current carrying wires.  With any time remaining, you'll work on FYP: Electromagnetism #1-10 if you have not finished or you can start your homework.  

Homework:  Read the rest of chapter 19 - sections 19.6, the first section of 19.7 (skip Electromagnets and Magnetic Permeability), and 19.8.  You will not be responsible for any of the equations in these sections.  Then do conceptual questions 17-19, 21-24, and 26  (p 688). (answersQuiz on all four right hand rules on Thursday, May 3rd.

If you need help understanding the right hand rules for a magnetic field CREATED by a current carrying wire, watch the following video:

Magnetic Field Electric Current RHR (Mrs. Twu)