# AP E&M Magnetism

Friday, 3-26-10:
• In Class:
• Homework:
• Over Break:
• Work on optics. You have 3 packets.
• Packet One contains instructional text (Mullins Optics),
• Packet Two contains images from your textbook.
• Packet Three is a question packet
• You are responsible for learning the sections on mirrors and completing packet 3.
• Packet One has lessons labeled. For example, the right have of the front sheet has a label,
• Lesson 4-06 Electromagnetic Spectrum, Reflection and Index of Refraction"
• Within this section, right now, focus on Law of Reflection.
• Lesson 4-07 Skip this section for now. We will come back to it.
• Lesson 4-08 ALL of this is required over spring break.
• Lesson 4-09 Skip this section for now. We will come back to it.
• Packet Three.
• Do ALL questions on this packet.
• Learn how to draw two rays for ANY circumstance. Use those two rays exclusively.
• Many places state that you should learn 3 rays. The 3rd ray is a double check of the first 2. Learn 2 rays perfectly. Use them perfectly. Then you don't need the 3rd and you save some time.
• Sample ray diagrams online:

Thursday, 3-25-10:
• In Class:
• Test on E&M
• Homework:
• Take-Home Test

Wednesday, 3-24-10:
• In Class:
• Review for E&M Test
• Homework:
• Study

Tuesday, 3-23-10:
• In Class:
• Rvw slideshow
• practice em induction with slides
• Homework:
• Sorry. This is a ridiculous amount of homework. We will work on some old ap problems in class tomorrow. I highly recommend the ilrn stuff.
• work on Knight 33 ##1a,b, d; 3; 4; 9; 13; 18,19; 21; 22
• Read 20.1, 20.2, 20.3. Using the ILRN codes for the diagrams & sample problems is a good idea
• Do P.S. 20.1:
• Conceptual Questions # 3, 7 - 11
• Problems: #1, 3, 6, 8, 9, 18, 23, 26,
• Note:
• Slideshow is attached below. as a ppt this time. if you don't have ppt, you can download a free ppt viewer.
• TEST thursday.
• E&M Slideshow

Monday, 3-22-10
• in Class:
• went over some problems in Knight 32 packet
• discussed flux
• Chapter 19 and 20 Test on Thursday
• End of the Quarter is this Friday

Friday, 3-19-10:
• In Class:
• Rvw slides on f q v B
• handout ap test registration forms (MUST be in next Friday).
• Homework:
• Knight 32 The Magnetic Field: #1, 10, 13-20, 25 - 33
• Note:
• Test Thursday next week. Ch 19 & 20.
• Copy of SlideShow

Thursday, 3-18-10:
• In class:
• Rvw slideshow.
• rvw
• solenoids
• B from solenoids
• B from wire
• Homework:
• PS 19.2:
• Conceptual Question #13 - 15, 19, 21
• Problems: 34, 35, 37, 45, 47

Wednesday, 3-17-10:
• In Class:
• review #11
• use filings to map field lines for magnets
• use solenoid and magnet
• Homework:
• calculations are less important.
• Understand how a loop (rectangular or circular) could rotate in a B field.
• Use your ILRN login. check active figures and physics now stuff for 19.5 - 19.9
• Read figures & captions for 19.5 - 19.9

Tuesday, 3-16-10:

• In Class:
• PPT on magnetism
• Discuss field lines.
• Try magnet on o-scope.
• discuss RHR #1. Use Orthogonal fingers, not curling fingers.
• Rvw Right Hand Rule. Our version:
• Thumb --> Velocity (TV)
• Pointer Finger --> B field (PB)
• Middle Finger --> Force (hmm)
• Demo w/ CRT & O-Scope
• Homework:
• Notes on Figures
• What is Right Hand Rule #1
• What must be true for B & I in order for their to be a force F?
• Do Problem Set PS 19.1:
• PS19.1:Conc Questions 1-3 Prob 2,3,11,15,23
• Read 19.10 Take Notes (should have read 19.1-19.4, and now 19.10).

Monday, 2/02/09:
• In Class: Look at Test
• Homework:
• Notes on Figures
• What is Right Hand Rule #1
• What must be true for B & I in order for their to be a force F?
• Do Problem Set PS 19.1:
• PS19.1: Prob 2,3
Tuesday, 2/03/09:
• In Class:
• PPT on magnetism
• Hang a magnet
• Discuss field lines.
• Fe filings on transparency on 1- magnet, 2 magnets.
• Try magnet on o-scope.
• discuss RHR #1. Use Orthogonal fingers, not curling fingers.
• Rvw Right Hand Rule. Our version:
• Thumb --> Velocity (TV)
• Pointer Finger --> B field (PB)
• Middle Finger --> Force (hmm)
• Demo w/ CRT & O-Scope
• Homework:
• Read 19.10 Take Notes (should have read 19.1-19.4, and now 19.10).
• Do PS 19.2: Conceptual Questions 1-3, Problems 11, 15, 20

Wednesday, 2/04/09:
• In Class:
• Look at homework
• Observe Right Hand Rule in details
• Homework
• None that I know of (by Stefan Platikanov)

Thursday. 2/5/09:

• In Class:
• turn in homework
• review homework
• review first pages of ppt.
• discuss magnetism
• begin lab

Friday, 2/6/09;
In class:
• Look at second right hand rule
• Do lab
Homework:
• notes of figures
• 2 questions that I don't know about (by Stefan Platikanov)
Monday, 2/9/09;
In class:
• Look at courses for next year
• Look at Right Hand Rules
• Do worksheet
Homework:
• The Knight worksheet #7,9,11-20,27-34

Tuesday, 2/10/09:
In class:
• Look at worksheet problems
• Book problem #30 with partners and whiteboards
Homework:
• #29-31 in book

Wednesday, 2-11-09:
• In Class:
• Review homework
• Rutgers test on smartboard
• Homework:
• Take notes on text, & figures. (John Mans)

Thursday, 2-12-09

Friday, 2-13-09:
• In Class:
• Check 20.1
• Rvw 20.1appb 2-13-09.pdf
• Rvw Flux.
• Rvw Induced Voltage and Induced Current.
• Intro / Discuss Len's Law. The direction of the resulting current flow... Check rest of ppt from yesterday.
• Homework:
• Read 20.3 - 20.4 Take Notes.
• Do PS 20.2:
• Conceptual Questions 3, 7 - 11
• Problems: 18, 23, 26,
Tuesday, 2-17-09:
• In Class:
• Review CQ #8, 9, Prob #23?
• Discuss motor / generator.
• Play with dc motors. get them to work.
• Homework:
• Knight Packet 33: #1a,b, d; 3; 4; 9; 13; 17 - 19; 21; 22
• Note:
• Test on Friday.
• Assign Extra Credit: make a dc motor that works by Monday, and get extra credit.

Wednesday, 2-18-09
• In Class:
• Review Knight Packet 33 Questions
• Activity: Try to light a light bulb with a cow magnet passing through a solenoid.
• Homework:
• Practice Problem 1999B3
• Note:
• Test on Friday.

Thursday, 2-19-09
• In Class:
• Review Practice problem 1993B
• Begin Rutgers U. B lab.
• Homework:
• finish 1993B3 question

Friday, 2-20-09:
• In Class:
• Lulai at Conference.
• Students to work on Rutgers Lab (did it go well?)
• Homework:
• Review some of the information on the links below.
• HippoCampus
• MT OCW electromagnetic induction
• University of Colorado at Bolder PhETsimulations
• Magnetism (& induction) notes from Mr. Wayne Mullins (Magnetism Notes). Good Stuff.

Monday, 2-23-09
• in class:
• work on lab
• homework:
• hippocampus links above to study
• test on friday
• extra credit:
• make generator / dc motor

Tuesday, 2-24-09
• In Class:
• Finish up lab work.
• Turn in lab.
• Start E&M Unit 4 Magnetism Worksheet packet.
• Homework:
• Aim to have front and back of first page of packet done for tomorrow.

Wednesday, 2-25-09
• In Class:
• Band kids gone.
• Work day on review packet.
• Homework:
• Work on packet at home.
• Study for test (Friday).

Thursday, 2-26-09
• In Class:
• CSI kids gone.
• Work day on review packet.
• Add on E&M Unit 4 Magnetism Worksheet 2 (one page front and back).
• Resolve any lingering problems with unit.
• Homework:
• Study, study, study.
• Test tomorrow.

Tuesday, 2-12-08:
• In Class:
• Review first pages of ppt.
• Discuss Magnetism w/ some history
• Do some B field lines.
• Homework:
• Create 4 Guided Reading Questions (how & why questions)
• Do Problem Set 19.1:
• Conceptual Questions 1-3
• Problem #2
Wednesday, 2-13-08:
• In Class:
• Rvw Right Hand Rule. Our version:
• Thumb --> Velocity (TV)
• Pointer Finger --> B field (PB)
• Middle Finger --> Force (hmm)
• Demo w/ CRT & O-Scope
• PPT
• Homework:
• Finish PS 19.1 from yesterday.
• Create 4 G.R. Questions from Reading (How & Why questions... Remember no How/Why this is calculated questions).
• Do Problem Set 19.2:
• Ch 19 Prob: 11, 15, 20
Thursday, 2-14-08:
• In Class:
• Review ps19.2
• Check ps 19.1, 19.2, guided reading
• Make an electromagnet
• Homework:
• Focus on Mass Spectrometer, Trapping Charges, and velocity selectors
• Problem Set 19.3: Prob #27, 30, 31
Friday, 2-15-08:
• In Class:
• Review Motors
• Homework:
• Try to finish PS 19.3

Tuesday, 2-19-08:
• In Class:
• Rvw #30
• Discuss motors / generators as energy traders:
• mechanical --> electromagnetic or
• EM --> mechanical
• Discuss Induction
• Homework:
• Take Notes
• Todays notes are below as a pdf. There are 2 runs (1 from each class) of #30. There is also a runthrough of #27.
Wednesday, 2-20-08:
• In Class:
• Review ppt
• Do magnet & Cu pipe demo
• Homework:
• Do P.S. 20.1: #1, 3, 6, 9, 17
Thursday, 2-21-08:
• In Class:
• Partner up for PS 20.1
• Homework:
• Try this packet (it was available at end of day).
• Do #:
• 1a, 1b, 1d, 4, 7, 12, 13, 15
• Note:
• The induced B field fights to OPPOSE the CHANGE in FLUX.
• Hold a loop of wire flat against this monitor.
• If you move (in your mind's eye) a magnet towards the center of the loop, the B field is increasing into the loop.
• The loop will have a current that Induces a B field to OPPOSE the change in flux.
• Note the change in flux is increasing B into the loop. The Induced B will be a B out (towards you) of the loop.
Friday, 2-22-08:
• In Class:
• Partner up and work on Knight packet from yesterday.
• Work on E&M Review packet (newly assigned on Friday). Do JUST THE M.C. Questions.
• Homework:
• Finish the two items mentioned as in class assignments.
• Note:
• Read the note from Thursday. I posted some helpful information on the classroom whiteboard (written in red to stick out). It appears no one read it. Similar content is posted above, but w/out the diagrams. The pdf above is similar to what was on the board on Friday and a bit improved from the note posted above for thursday.
• A test is coming. Probably Wednesday.
Monday, 2-25-08:
• In Class:
• Review some questions from Thursday & Friday.
• A bit of work time
• Homework:
• Try to finish the previously assigned questions.
• Note: Test Thursday.

Tuesday, 2-26-08:
Wendesday, 2-27-08:
• In Class:
• Homework:
• Study.
• Topics include:
• Magnetic Fields
• B Fields of wire (B=NuI/(2R)) focus on qualitative & RHR 2
• B Fields of a solenoid (B=unI) focus on qualtitative and RHR 3
• Forces on moving charges due to magnetic fields
• Forces on current carrying wires
• Center Directed Forces (F_centripetal) on charges.
• RHR 1: Thumb & velocity; pointer and B field; middle finger & Forces
• RHR 2: Thumb in direction of conventional current flow, fingers curl in direction of B field
• RHR 3; Thumb in direction of Magnetic Field, fingers curl in direction of convention current travel through wire loop.
• Flux (O = BA)
• Change in Flux
• Induced Voltages (Faraday's Law of EM Induction ( V = vBL) or also used { V = (-N (change in Flux)/time) }
• Lenz's Law