Lecture 32  iq28

 

1. Motional emf is one special case of Faraday’s law.

2. Dicussions on selected problems in Ch23.h1.

o   001-006

o   007 Ec can be directed direcrtly from Faraday’s law independent of the presence of the wire loop.

o   8-9 Total energy dissipated. P=IV, V=IR.

o   10 Figures involve coils.

o   12 Calcuation of the flux in a loop where B depends on x.

o   A problem which calculates ENC

Announcement:

Re: Adjustment on present lesson plan

Our lectures are slightly behind our original lesson plan.  The updated lesson plan is as follows.

o   Postpone the due date of ch23.h2 from the coming Sunday to next Tuesday.

o   Due dates of ch23.h3 and ch24.h1 will be on the Wednesday of the following week. (Using present lesson plan notation, it is “W”)

o   Ch24.h2, ch24.h3 on Su.

o   Ch24 h4, ch24.h5 on W

o   Ch25-h1 on Su

Midterm3 will now cover the exam materials only through ch23-h2.Notice that the inductance and the LR circuit are covered in ch23-h2. They will be included in the exam. On the other hand  problems which involve LC circuits only appear in ch23-h3. They will not be included in this exam.