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Lecture: 21  (iq19)

 

Applications of Ampere’s law

1.     Amperian loop with a circular shape

·      Long wire

·      Long thick wire with radius R (h4-002)

·      Coaxial cable (h4: 010-011): clicker: Area of a ring

·      Cylindrical conductor with a hole (h3:016): clicker: Bhole alone at x?

2.     Comments on selected problems in h4.

·      h4:004-006 Torid: See p920, fig22.52, fig22.53.

·      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).

·      h4: 008:Window. Generalized Amp. law: More than one current is encircled and S can take on an arbitrary shape.

·      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.