The basic physics of magnetism was developed by Biot and Savart (building from experiments), published in 1820. Ampere constructed a more modern method in 1826 (which was later taken up by Maxwell, and which we will learn about the week after break!)
__________________________________________________________________________________________________________________________

When I was in grad school, Prof. Blas Cabrera had just published a paper on a measurement consistent with the possible observation of a magnetic monopole (on Valentine's day, 1982) . I remember one year after his discovery, the following appeared on his office door:

Roses are red
Violets are blue
Isn't it time
For Monopole two?

The result turned out to be an interesting solid state effect in his apparatus (related to "flux pinning"), which mimicked the signature of a monopole, not likely a monopole itself! Nobody has detected a magnetic monopole.

I once asked my 1120 students to come up with their own poem, and here is my favorite, a Haiku (written by C. Weidner):

It is Friday Night
Like a magnetic field
I will do no work.

Spring break! Then,
Week 11 (Apr 1 - Apr 5):

After carefully defining current and current density, we will concentrate primarily on how to calculate B-fields from a given current distributions. (Oh, and of course, magnets are still fun!)

Special notes:

• Exam is THURSDAY (this week, Apr 4) 7:30-9:15
  SOLUTIONS will be posted on D2L tomorrow (Friday). (There are a couple of students in class out of town who will take it slightly later than us)
  - Exam info is at the usual spot (see the Exams and Grades link in the middle on the left, under "Other course links"
  - Have you noticed that (all semester) clicker questions from class are posted *with answers*? See the "Lecture notes, ConcepTests and more" link (top left), navigate to the concept test page, and look at the *very first link* at the top of that page, "CT Results are all here". (Answers may be a little hard to spot, it's the last entry in the upper left corner of each separate question)
  
  
• Next homework is HW 12 (Due Wed, Apr 10)
• The next preflight is up, due Monday (Apr 8)
  
  
  
• Please visit our piazza site. I give extra credit for participation there. (The more who do that, the more useful it becomes to the rest of us.)
  We also have a D2L (learn.colorado.edu) site - I post solutions there
  
• Video lectures:here.
  
  

  ---

  OLDER Webpages, for reference and old links: Week 1, Week 2, Week 3, Week 4, Week 5, Week 6, Week 7, Week 8, Week 9, Week 10,
  
  

I welcome your comments on the class and this website. Send them to steven.pollock at colorado.edu
(Thanks to Prof. Chuck Rogers for many of our home page image ideas!)