Physics 213
Physics for Scientists and Engineers - III
Spring 2015
!
Instructor:*Walter!Christensen* !
!
Email: walterjchristensen@yahoo.com
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Welcome!Electric!and!Magnetic!Field!Students.!In!this!course!we!will!explore!the!very!foundations!
of! nature;! a! mysterious! but! measurable! realm,! based! on! the! idea! of! unified! Electric! and! Magnetic!
Fields.! A! course! that! explains! what! light! is! made! of;! a! class! that! teaches! you! how! to! construct!
electric! circuits,! understand! capacitors,! inductors,! resistors! and! more;! in! short! a! course! that! has!
both!theoretical!and!practical!applications!in!the!real!world.!!
*
Overview*of*Physics*213:**By!applying!fundamental!principles,!physicists!try!to!predict!how!physical!
systems!behave!and!to!explain!why!they!do!so.!!This!course!is!designed!to!familiarize!you!with!these!
principles,!not!so!that!you!become!physicists!necessarily,!but!to!enable!you!to!use!them!in!your!
chosen!field!of!study.!The!major!areas!covered!in!this!course!are!electric!and!magnetic!fields,!
electric!potentials,!currents,!and!Maxwell’s!equations.!
!
Rio* Hondo* Course* Website:! http://www.riohondo.edu/mathematicsMandMsciences/mathematicsM
andMsciencesMhomepage/physics/phyM213/!
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The!following!items!are!important!technicalities!that!will!be!helpful!and!important!in!succeeding!in!
this!course.!Overall,!however,!I!hope!it!is!the!physics!that!you!find!exciting!and!meaningful.!!
!
A)*
Required*Text:*Six$Ideas$That$Shaped$Physics,!Units!E,!Moore,!3rd!edition.!
*
B)*
You!will!need!to!download!a!simple!program!called!ProbViewer,!which!provides!you!the!answers!to!
the!questions!in!your!!book!(Six$ideas$that$shaped$Physics)!that!you!will!be!graded!on:!!
http://www.physics.pomona.edu/sixideas/sicpr.html .
After!you!go!to!this!website,!scroll!down!to!the!paragraph!that!say:!“For*All*Units.”!At!the!bottom!of!
this!paragraph!click!on!Mac!or!Windows!to!download!ProbViewer!for!your!system.!Once!
downloaded!extract!out!file!from!ZIP!by!clicking!on!it.!Then!simply!click!on!the!icon!labeled!
ProbViewer.!It!is!a!simple!program!where!at!the!top!where!it!says!“show!Problem”!you!select!the!
question!you!want!by!clicking!in!the!field!and!scrolling!down.!
!
!
*
Other*Required*Materials:!Scientific!calculator,!a!ruler!marked!in!centimeters.!
Physics 213
Spring 2015
If*your*stuck*questions*can!be!answered!during*Physics!213!Laboratories:!02:15!M!3:40!pm!and!05:30!
M!06:55!pm.!
!
*
C)*Student*Learning*Outcome:*!
Physics 213: Physics for Scientist and Engineers-III: Given a continuous distribution of charges, students will
calculate the electric field at an arbitrary point in space. Students will be able to derive an expression for the
motion of a charged particle in magnetic field. Students can explain from a microscopic point of view the nature
of electrical current and electrical resistance. Given a vector field, electric or magnetic, students will explain the
presence or lack of sources by applying the vector operations curl and divergence. Students will design an
experiment that measures the magnetic field produced by Helmholtz coils. Students will derive from the electric
field the potential and from the potential the electric field.
*
D)*Course*Description:!This!course!is!the!third!of!a!threeM!semester!sequence!and!is!designed!for!
students!transferring!to!a!fourM!year!institution!with!majors!in!the!sciences!and!engineering.!Topics!
covered!are!electric!fields,!electric!potential,!current,!circuits,!magnetic!fields,!Gauss’!law,!Ampere’s!
law,!Maxwell’s!equations,!induction,!and!electromagnetic!waves.*
*
E)*Prerequisite:!PHY!212.!Note:!Although!MATH!191!is!technically!not!a!prerequisite,!completion!of!
Calculus!II!is!necessary!for!success!in!PHY!213.*
!
F)*Studying*Physics:*Since!Physics!213!is!a!fourMunit!course,!you!should!be!putting!a!minimum!of!12!
hours!of!study!outside!the!classroom!every!week.!!While!this!level!of!effort!will!not!guarantee!a!
particular!grade,!any!less!effort!will!increase!the!likelihood!of!a!poor!grade.!!When!you!are!having!
problems!with!the!material,!seek!assistance!immediately.!!Do!not!get!behind!in!this!course.*
!
It!is!essential!that!you!read!the!text.!!I!assume!that!you!not!only!read!the!textbook,!but!that!you!do!
so!in!an!active!manner.!!An!active!reader!stops!often!to!ask!questions.!!“Is!this!making!sense?”!!Am!I!
following!the!logic?”!!“Can!I!apply!this!material!to!realistic!situations?”!
!
Doing!the!homework!is!essential!to!learning!physics,!and!quizzes!are!based!on!the!homework.!!You!
should!attempt!all!the!assigned!problems,!plus!you!should!be!trying!additional!questions!and!
problems!for!additional!practice.!When!you!are!attempting!a!problem,!you!should!focus!on!the!
concepts,!not!the!equations.!!Physics!is!not!about!plugging!numbers!into!equations.!!Your!solution!to!
a!problem!should!have!an!explanation!of!your!reasoning!and!clear!and!neat!mathematics.!!
!
G)*Lecture:*You!must!come!to!every!class!period!prepared!to!think.!!Passively!listening!to!a!lecture!is!
not!an!effective!way!to!learn.!!You!must!be!engaged!with!the!material!and!participate!in!the!class.!!
This!means!you!are!to!be!prepared!for!class,!be!ready!to!answer!questions,!and!most!importantly,!
ask!questions.!!Attendance!is!required.!!Excessive!absences!may!severely!affect!your!grade.!Cell!
phones,!pagers,!and!other!electronic!devices!are!to!be!turned!off.!!Food!and!drink!with!the!
exception!of!bottled!water!are!not!to!be!brought!into!the!classroom.!
!
H)*Workshop:*The!inquiryMbased!workshop!consists!of!traditional!laboratories,!video!analysis,!
thought!exercises,!computer!simulations,!and!an!opportunity!for!physics!discussions!between!you!
and!your!group!members.!!Workshops!must!be!attended.!!An!unexcused!absence!can!severely!affect!
your!final!grade.!!Three!or!more!absences!will!result!in!your!grade!falling!one!letter!grade,!e.g.!from!
2
Physics 213
Spring 2015
a!B!to!a!C.!!So!if!you!are!unable!to!attend!for!any!reason,!please!see!me!in!advance.!!There!will!be!
occasions!when!we!will!use!the!lecture!period!for!workshop.!
*
I) Reports are due at the next class meeting. I do not require any specific format for your labs, but
they are to be clearly written and contain enough detail so that they are useful in studying. After all,
these reports are your only record of what you did in the workshop. Reports that I cannot read will
not be graded. Finally there is e/m Report due worth 50 points. The first part is a 3-day lab on the
Motion of a Charged Particle in a Magnetic Field. The second part of the report, on the Magnetic
Field of the Helmholtz Coils, is an opportunity for you to design your own experimental set-up.
You may use anything in the lab, as long as it gets returned to its proper place. You have one day to
design, and one day to take data and analyze. Often Rio Hondo 213 students gets 6 different
approaches to the Magnetic Field of the Helmholtz Coil problem.
!
J)!Lab!station!worked!at!must!be!left!in!the!same!or!better!condition!that!you!find!it.!!Three!points!
will!be!deducted!from!your!lab!if!I!must!clean!your!station.!!Cell!phones,!pagers,!and!other!electronic!
devices!are!to!be!turned!off.!!Food!and!drink!with!the!exception!of!bottled!water!are!not!to!be!
brought!into!the!laboratory.!!Bottled!water!will!be!kept!away!from!all!equipment!and!off!the!lab!
tables.!!All!bags!are!to!be!stored!under!the!side!table.!
!
K)*Homework:*Certain!homework!problems!found!in!you!book!(Six!ideas!That!Shaped!Physics)!see!
the!schedule!below,!will!be!collected!at!the!start!of!class!each!Thursday,!starting!on!February*05*(E1*
T4).!!Solutions!to!these!problems!will!not!be!available!until!after!they!are!graded.!!Submissions!must!
state!the!problems!from!the!book!and!must!be!wordMprocessed,!although!equations!may!be!neatly!
handwritten.!To!see!the!answer!be!connected!onMline!then!click!ProbViewer;!enter!the!student
password: WCphy213SPR15, which activates 02 February 2015.*
!
L)*Exams*are!designed!not!only!to!test!your!knowledge,!but!also!your!ability!to!use!and!synthesize!
that!knowledge.!!They!consist!of!several!questions!and!problems!based!on!lecture,!workshop,!and!
the!text.!!Some!questions!will!require!you!to!write!a!short!paragraph!of!explanation.!!I!will!provide!
you!with!a!sheet!containing!some!of!the!relevant!equations!and!constants.!!The!final!exam!is!
comprehensive!and!will!be!given!on!Tuesday,!May*26,!2015!from!4:00*to*6:00*pm.!
!
M)* Disabled* Students* Programs* and* Services:* Any! student! with! a! disability! who! believes! that!
he/she! may! need! accommodations! in! this! class! is! encouraged! to! contact! the! Disabled! Students!
Program! and! Services! office! (SS330)! as! soon! as! possible! to! ensure! that! such! accommodations! are!
implemented!in!a!timely!manner.*
!
N)*Grading:*Your!grade!is!determined!on!the!basis!of!total!points!earned!as!follows:*
!
!
Four!exams!@!50!points!each,!
!
!
Comprehensive!final!exam!@!200!points,!
!
!
Homework!@!10!points!each!
!
!
Workshop!reports!@!10!points!each!
e/m!Report!@!50!points!(includes!reports!for!Motion$of$a$Charged$Particle$in$$
a$Magnetic$Field!and!the!Magnetic$Field$of$the$Helmholtz$Coils)!
The!scale!I!use!to!determine!your!final!grade!is!
!
!
85%!of!the!possible!points!and!above! !
A,!
!
!
70%!of!the!possible!points!and!above! !
B,!
!
!
50%!of!the!possible!points!and!above! !
C.!
3
Physics 213
Spring 2015
Three!or!more!absences!from!workshop!will!result!in!your!grade!falling!one!letter!grade.!
!
Course*Schedule*
(May*change*slightly*due*to*unforeseen*circumstances*and/or*needs*of*the*class)*
*
!
Tuesday*
Thursday*
Feb* *Feb.!03:*CH.*E1*Electrostatics!
Feb!05:*CH.*E2**Electric!Fields!
TTH**
HW:*E1*T4*
Feb.* Feb.!10:*CH.*E2!Electric!Fields*
TTH*
Feb!12*CH.*E3!Cont.!Charge!Dist.!
HW:*E2*B8*
Feb.* Feb.!17:*Ch.*E3!Cont.!Charge!Dist.!
TTH* *
Feb!19:!CH.*E4*Electric!Potential!
HW:*E3*S1*
*
Feb.*
TTH*
*
Mar.*
TTH*
*
Mar.*
TTH!
Feb.!24!CH.*E5*Currents!
!
Feb!26!CH.*E5!Currents!
Test%1*(E1)E4)*
Mar.!03:*Ch.*E6!Circuits!
!
Mar!05:!CH.*E6!Circuits!
HW:*E5*B6*
Mar!10*Special!Relativity!
!!
Mar!12*Special!Relativity!
HW:*E5*S12*
Mar.* Mar!17!CH.*E7*Magnetic!Fields!
TTH* $
Mar!19*CH.*E7!Magnetic!Fields!
HW:*E6T3*
Mar.* Mar!24!CH.!E8!Currents!Respond!To!
TTH* Magnetic!Fields!
Test%2%(E1)E7)*
Mar.* Mar*30**
TTH! No*Class*–*Spring*Break*
Mar*26*E8!Currents!Respond!To!Magnetic!
Fields!
!
April*03*
No*Class*–*Spring*Break!
*
Mar*&* Apr*07*Monday*!
Apr* E9!Currents!Create!Magnetic!Fields!
Apr*09!E10!Currents!Create!Magnetic!
Fields.!HW:!E8T4!!
Apr.* Apr*14!E10!Gauss’s!Law!
TTH* !
Apr*16*E11!Gauss’s!Law!
HW:!E8S3!
Apr.* Apr*21!E11!Ampere’s!Law!
TTH* !
Apr*23*E12!Calculating!Fields!
HW:!E9S5!
Apr.* Apr*28*E12!Calculating!Fields!
TTH!
Test%3%(E1)E11)*
Apr*30*E13!Maxwell’s!Equations!
HW:!E12T1!
Apr.* May*05!E13!Maxwell’s!Equations!
TTH* *
May*07!E14!Induction!
HW:!E12S2!
May* May*12!E14!Induction!
TTH* !
May*14*E15!Introduction!of!Waves!
HW:!E13S4!
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Physics 213
Spring 2015
May* May*19!E16!and!Test$4$(E1AE14)!
TTH!
Electromagnetic!Waves!
May*21!E16!
Electromagnetic!Waves*
May* May!26!Tues!Final!exam!4:00!–!6:00!
TTH* pm!
*
*
*
Homework*
Immediately! below,! are! the! assigned! problems.! ! To! view! the! answers! to! these! questions! found! at!
the! end! of! each! chapter! of! your! book! (Six! ideas! That! Shaped! Physics),! you! must! use! the! program!
ProbViewer! available! at! http://www.physics.pomona.edu/sixideas/sicpr.html.! The! password! is!
WCphy213SPR15, which activates 02 February 2015.! Answers! are! available! to! all! problems,!
though! for! the! E1T! problems! scroll! wayMway! down! toward! the! bottom.! Solutions! to! assigned!
problems!are!available!on!the!date!indicated!on!the!schedule. Problems!marked!with!an!asterisk!(*)!
do!not!have!solutions!available.!
!
E1*T1,3,4!,5,9*
B1,2,4!!!S1,6,10!!!R1!
!
E4*T1,4,6!,7*
B1,4,8*,12*!!S1,3,4!
!
E7*T1,3,6,10*
B1,5!!!S3,4,5!
!
E10*T1,2!,3,4*
B2*,5*!!S1!
!
E13*T1,2,7*
B1,3!!!S2,3,4!,5!!!R1!
!
E2*T1,3,4,7,10*
B3,5,7!!!S2,3,4,8!
E3*T1,3,5,6*
B2,4,6*,7*!!!S1!,2,3,7!
E5*T1,4,6,8*
B3,5,6!,7!!!S3,10!!!R1,2*!
E6*T3!,4,5,7,11*
B1,4,7,8,9!!!S2,8!
E8*T1,3,4!,5*
B1,3,5!!!S1,3,6,9!
!
E11*T1,4,6*
B2*,4!*,5*,6!!!S1,5*!!!R2!
E9*T2,5,7*
B2,5,7,10!!!S3,4,5!!
!
E12*T2,3,4*
B1,2,4*!!!S1,2!,10!!!R1!
E14*T1,3,8*
B1,5,8!!!S1,5!
!
E16*T1,2,3,4*
B3!!!S4,5!
!
5