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StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
aufbau
Hund'sRule
Pauliexclusionprinciple
Didyouremember:
http://chemwiki.ucdavis.edu/Physical_Chemistry/Quantum_Mechanics/Quantum_Theory/Trapped_Particles/Atoms/Electron_Configuration
http://www.kentchemistry.com/links/AtomicStructure/PauliHundsRule.htm
https://www.youtube.com/watch?v=LJsP0ihzbw
https://www.youtube.com/watch?v=eTMtRh8AIs
http://chemwiki.ucdavis.edu/Physical_Chemistry/Quantum_Mechanics/Quantum_Theory/Trapped_Particles/Atoms/Electron_Configurationhttp://www.kentchemistry.com/links/AtomicStructure/PauliHundsRule.htmhttps://www.youtube.com/watch?v=LJ-sP0ihzbwhttps://www.youtube.com/watch?v=e-TMtRh8AIs
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
ElectricityQuestions:1. Whatisthedifferencebetweenaninsulatorandaconductor?
Provide2examplesofeach.
2. Inanatom,wherewouldyoufindeachofthese:
3. Aneutralobjectbecomes________________chargedifelectronsareremoved.
4. Twoobjectshavecollectedstaticelectricitywiththesamecharge.Whatwouldtheobjectsdowhenplacedneareachother?
5. Whatdoesitmeanwhenwesayanatomisneutral?
a.protons b.neutrons c.electronsnucleus nucleus cloud
positively
Insulator:electronsdonotmovefreely
Conductorelectronscanmovefreely,permitotherelectronstomovethrough
rubber,plastic,dryair,glass
mostmetals,skin,wet/humidair
theywouldrepeleachother
ithasanequalnumberofprotons(+)andelectrons()
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
6.Iftheoverallnetchargeisthesumofallchargesonanobject,whatisthesignificanceofanoverallnetchargethatisnegative?
7.Howisastaticchargecreated?
8.WhatisaCoulomb?
9.Whatdoesanelectroscopeindicate?
10.Howcanyouuseanelectroscopetodeterminethechargeofanunknownobject?
Therearemoreeontheobjectthanprotons.
frictiontheunitforcharges
presenceofcharge
bringtheobjectclosetotheelectroscope:ifitisneutral,theelectroscopewillnotchange.
ifithasacharge,youcanbringinanobjectwhosechargeisknown.ifthatobjectandtheunknownattract,theyareopposite,otherwisetheyaresimilar(samecharge).
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
11.Explainhowastaticchargeisgenerated.Whatarethecharacteristicsofastaticcharge?
12.Usediagramstoillustratetheelectricfieldaroundthefollowing:
a(+)charge a()charge (+)chargetwiceasstrong asthefirstcharge.
excessofelectronsbuildsuponanobject.Oftenaresultoffriction.
+
+
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
13.Brieflyexplainchargeseparation(outlinethebasicsteps).
14.Brieflyexplainchargingbyconduction(outlinethebasicsteps).
1)arodwith()chargeisbroughtnearaneutralelectroscope.
2)Electronslocatedatthetopoftheelectroscopewillberepelledfromtheincomingrod.Theywillflowdownintotheleaves,thefarthestplacefromthe()source.3)Theleavesnowhaveexcesselectrons,andoverall()charge.
4)Theleaveswill repeleachother.
1)A()rodisbroughttoaneutralelectroscope.2)Astherodapproaches,eontheelectroscopearerepelledtowardtheleaves.Thisleavesthetopwithanoverall(+)charge.3)The()rodmakescontactwiththeheadandtransferse.4)Whentherodisremoved,theelectroscopehasanoverall()charge.
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
15.Brieflyexplainchargingbyinduction(outlinethebasicsteps).
16.Whatisacapacitor?Brieflyexplainthestructureandfunction.
17.Whatdowemeanbythetermgrounding.Whattypesofobjectscanprovidethis?
deviceusedtostorecharge.Maybeusedtodrain"excess"chargefromanobject.
providesapathwayforchargestoreachEarthsurface.people,metalrods,trees
Example:1)Startslikechargeseparation.2)Whilethe()rodispresent,anobjecttouchestheelectroscopeandthe"excess"earedrained.3)Whentherodistakenaway,theelectroscopeisleftwithanoverall(+)charge.
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
18.Whatistheultimatedestinationofchargesthatarebeinggrounded?
19.Provideanillustrationdemonstratinghowchargedparticlesaredistributeda)onaneutralobject.
b)onanobjectthathasexperiencedchargeseparation.
Earth!
++ ++
+ +
+ +++
+
+
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
20.BeabletouseCoulombsLawtosolveproblems.
a)Apointchargeof+2.0Cislocated0.15mfromasecondpointchargeof4.0C.Whatisthemagnitudeanddirectionoftheforceoneachcharge?
=2.0x106
attractive
meters
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
b)Twochargesofequalmagnitudeexertanattractiveforceof4.0x104Noneachother.Ifthemagnitudeofeachchargeis2.0C,howfarapartarethecharges?
8.99x109x(2.0x106)x(2.0x106)4.0x104
r2=
r=9.48metersr2=89.9
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
21.Whatistheelectricforce?
22.Whatfactorswillaffecttheforcebetween2charges?
23.Explaintheprocessbywhichlightningiscreated.
theinfluenceachargehasonitssurroundings.
strengthofthecharge,whethertheyaresameoroppositecharges,distancebetweenthecharges.
tallthunderstormsicecrystalsform asicefalls,collisionsoccur Collisionselectronsreleasedfromthecrystalscloud
becomes() Excess()incloudforces()awayontheground Lightning=dischargeofexcess()totheground
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
MagnetismQuestions:24.Whatisamagnet?
25.Whyisanelectronsspinsignificant?
26.Whatisadomain?
27.Whatistrueaboutthedomainsinapermanentmagnet?
28.Whatisthearrangementofdomainsinanonmagneticsubstance?
regionwhereallelectronsarespinninginthesamedirection.
spinningelectronthatisnot"cancelled"byanoppositespinwillcreateamagneticfield.
theyareallorientedinthesamedirection
random!
objectthateithercontainspairedethatspininthesamedirectionor asingle electron thatspins
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
29.Explaintheimportanceofvalenceelectronconfigurationindeterminingwhetherasubstancewillbemagnetic.
30.Explainhowapermanentmagnetcouldbedemagnetized(>1example).
31.Inamagnet____________poleswillattract,and______________poleswillrepel.
opposite similar
heatitup(excessiveheat),strike/dropit
dorforbitals unpairedelectrons
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
32.SketchtwoNorthmagnetendsthatarerepelling.HINT:Whatshouldthefieldlineslooklike?
33.WhattypeofmagnetistheEarth?
34.Accordingtothemostrecentresearch,howisthemagneticfieldoftheEarthformed?
electromagnet
http://esamultimedia.esa.int/multimedia/edu/PlanetaryMagneticFields.swf
http://esamultimedia.esa.int/multimedia/edu/PlanetaryMagneticFields.swf
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
ThisanimationshowsacrosssectionofEarthitillustratesamathematicalmodelofhowconvectionmightoccurinthemantle.
Inthemodel,redrepresentsheatedmaterialsthatarelessdensethantheirsurroundings.Darkbluerepresentscoolermaterialsthataredenserthantheirsurroundings.
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
35.Drawandlabelapermanentbarmagnetwithmagneticfieldlinesintheproperdirection.
36.Whatismagneticflux?Howdoesitrelatetothemagneticfieldandthemagneticforce?
37.Whatisformedwhenyouruncurrentthroughawire?
38Usingthefirstrighthandrule,ahandgrippingawirewithcurrentflowingindicatescurrentwiththe___________andindicatesthedirectionofthemagneticfieldwiththe__________.
S N
#offieldlinesinanareaItisanindicationoffieldstrength
thumbfingers
anelectromagnet
StaticElectricityandMagnetismReviewfortheTestANSWERKEY2015.notebook
EXTENDEDVERSION
November20,2015
39.Whatisanelectromagnet?
40.Whatisasolenoid?
41.Whathappenswhenthedirectionofcurrentinasolenoidisreversed?
42.Howdoesthenumberofcoilsinanelectromagnetaffectitsstrength? Whatotherfactorscouldyouchangetoalterthestrength?
atemporarymagnet needsanelectriccurrent
wireswrappedaroundametalcore
polesofthemagnetarereversed
Attachments
es0805_convection.swf
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