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Lectures
Lecture: 21 (iq19)
Applications of Ampere’s law
1. Amperian loop with a circular shape
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Long wire
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Long thick wire
with radius R (h4-002)
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Coaxial cable
(h4: 010-011): clicker: Area of a ring
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Cylindrical
conductor with a hole (h3:016): clicker: Bhole alone at x?
2. Comments on selected problems in h4.
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h4:004-006 Torid: See p920, fig22.52, fig22.53.
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h4: 012-014: Currents
inside and outside of an Amperian loop
See clicker 20-1 (Read Lec20-1 slides, understand
fig20-1a, fig 20.1b).
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h4: 008:Window. Generalized Amp. law: More
than one current is encircled and S can take on an arbitrary shape.
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h4: 009: Tornado.
3. Amperian loop with a rectangular shape.
·
Wire sheet:
h4-001
B-pattern. LHS, RHS. Solve for B?
·
Solenoid: h4:
003,007, Text p919. Solve for B inside of the solenoid based on fig22.20.
B-pattern. LHS, RHS. Solve for B?
Announcement:
o
Regular office
hours: MWF 9:15 to 10:15.
o
Review unit2:
o
Work through the
summary of unit2 line by line.
o
Study today’s
discussion on Ampere’s law and complete Ch18.h4.
o
Next Wed lecture
will be devoted to review unit 2.
o
An extra review
session: Wed. 5-6pm, Wel 2.304.
o
Extra office
hours: Thursday office hour: 2-3:30pm.