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Lecture: 20
(iq18) Ampere’s law and Bar-magnet
1. Ampere’s law
o
Example:
The long wire case
o
General
form of the Ampere’s law
2. More applications:
o
Thickwire (with radius R): r>R
o
Thickwire (with radius R): r<R
o
Solenoid
o
Current
sheet
3.
Magnetic moment of a bar magnet
o
Atomic
structure: Dipole moment and angular momentum
o
Quantized
angular momentum
o
Ball
park confirmation of the theory
Announcement:
o
Summary of unit 2
has been posted. (See “Lecture related” link)
o
Due dates of h2,
h3 and h4 have now been postponed by 24 hours.
o
h3: 3/2, 11:30pm
o
h4: 3/5, 11:30pm
o
Extra review
session: Tue 5-6, ECJ 1.214
o
Extra office
hour: Thursday 2-3:30pm
o
Change of exam
site for midterm2 and midterm3. New
site: Bur 106.