20 大学物理 1-220_试卷（英语）.pdf

第1页：试卷抬头与答题纸

（承上页）试卷纸考试HIi:UNIYERCITYPHYSICS(!)迎＇，；I-·I二I三I1/.blI五I六儿11·11--11习I刁十四IIIii总分分数日'ti:),I,Choosethecorrectonefromthefouritems(30scores)专,11,1书；班级姓名II国家级（心省、部级（）学校级（）自命题（）答题纸页数伈(!)Onasmoothtabletop,twosmallballsofmassesm1andm2areconnectedwithalightspringofcoefficientk"Thetwoforcesexertedonthetwoballsaresameinvaluebutoppositeindirection"Iftheballsandthespringareasystem,thenthesystem's()(3scores)(A)momentumisconserved,mechanicalenergyisconserved(B)momentumisconserved,mechanicalenergyisn'tconserved(C)momentumisn'tconserved,mechanicalenergyisconserved(D)momentumisn'tconserved,mechanicalenergyisn'tconserved(2)Asmallvehicleisrestonasmoothground.IfmovetheboxfromtheleftendtotherightendwithauniformforceF.Thevehicleisandisn'tfixedonthegroundintwocases.Ifchoosethegroundtobethereferenceframe,then()(4scores)(A)theworksdonebyFareequalinthetwocasestheworksdonebyfrictionareequalinthetwocases(B)(C)the(D)thekineticenergiesoftheboxareequalinthetwocasesheatenergiesproducedbyfrictionareequalinthetwocases.t1nbb/牟atepstto卜卜RRaeattsmfrs。。ecrp.Icatst．ausqasecne．erxpegasgealsCidCJof)d、丿nki(ACJ.IS(A)anadiabaticcompressingprocess.(B)aconstantvolumeprocesswithheatabsorbed(C)acompressingprocesswithheatabsorbed(D)aexpandingprocesswithheatabsorbed飞（飞)(4SCnotb

1. 2.slen尸a/oVchhiwdeu。矗。cnccabaedastoeaswrokssenrgaswceiedocproheatgeasybthand二二『aoreleedebassurelacesatmnengasprhentepethethetheiecl西eXbQggeCyasabbevgssssssthatiaeleoeeoecoeegingengldprprpranndadthethethe0flS沺．kmmmdeSuth、丿CAusthee”汃侚＠、。T｀．沁

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第2页：平行板电容器试题

（承上页）:e:is_P_arallIpltecapacitorofareaAanddistanced.AlongitslengthL,inseratdielectric0;constantEinlengthx.Thenthecapacitanceofthesystemis:()(4;cores)(A)竺（B)空尸AddLC。A(C)一—-d(D)(C-C。)Ax+c。ALdL_仄L---(6)Acircularplateisrotatingaccordingtothefixedaxisthatpassesthroughthecenteroperpendicularly.Iftwoidenticalbulletswithsamespeedshotintheplatealongastraightlineandstayintheplate.Attheinstantthatthebulletsshotin,theangularspeed(,)oftheplate:()(4scores)(A)increases(B)decreases(C)doesn'tchange(D)can'tdetermine(7)Accordingtothefigure,whichexpressioniscorrect?(A)伊·压＝2µ。I(C)'lf．压＝µ。I叩压＝－µ。I司？·压＝－µ。I,/-o-=)(4scores)----..-.,~-~~／／一，＿一一上－－、、、＼//、III广～、，－－、＼1\\{,0芞｛心｝枑｀＼｀，飞t句＇／I、、、`，-、-----,,,、_,、、-----(8)AcircularwirecarriescurrentI.ChooseaconcentriccircletobetheintegralpathL,thenwhichexpressionisright?()(4scores)(A)伊·压＝0,toanypointofthecircuitL,B=O.(B)伊·压＝0,toanypointofthecircuitL,B:;t:.O.(C)伊·压＃0,toanypointofthecircuitL,B土

1. 0.(D){B．cir*0,toanypointofthecircuitL,B=constant.I@2,Fillintheblankswithrightanswer.(30scores)(!)Abodyofmassmmovesinaprojectilemotion.Theinitialspeedisv0,theprojectileangleisO.Duringtheprocessthebodymovesfrominitialpointtothehighestpoint,theimpulseofexternalforceis.Thedirectionoftheimpulseis.(4scores)(2Jlfherarmswhilesheisrotating.Herkineticenergywill-——Hermechanicalenergywill.(4scores)q12rl(

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第3页：质点运动英文试题

3}Apan_icle-fm_assnmovesfromstaticstate(supposeit1stheoriginofthecoordinate)along-a.,iposit'.vedirection.TheforceexertedonitisF=kx(kisapositivecnstant).Duringtheproces:thatthepaniclemovesfromtheorigintoxo,thevalueoftheimpulseis..(4scor;s)t4)Thesecondlawofthermodynamicsgivesanaturalpoc_esscanhappeniftheentropyofth二忑了constantduringanaturalprocess.(4scores)ofthenaturalprocess.Ittellsusevery．ltmeansisnota(S)Iflrri.oolfidealgasabsorbs.//55Jofheattoincreasethetemperaturefor2Kinconstantvolumeprocess.Thegasisa——moleculegas.Theratioofthecapacityis.(3stores)(6)Therelationbel\\eenelectricfieldandelectncpotentialcanbeexpressedbyE=、orV=Itmeanselectricpointstothedirectionthatelectricpotential｀.(3scores)(7)1fapomtcharge-<.JmovesmtoBwithvelocityi'(asshowninfigure)anditcankeepbalanceEduringthemotioP.Thevalueof.(Ignoreedgeeffect)(4scores)BEs.·rectangularconductorcarriescurrent/anditisputinauniformmagneticfieldB.Biperpend;cularttheconductor'sleftandrightsurface.Thentheuppersurfaceoftheconductorwillcharge.(4scores)喝－－．＿3,Calc:ulateprt.l>lerrf30记orc1)IontwoidenticalumfonnpullcicsUndertheendolthl引1ingthl,r,]mrc,pcc11-..clyfhctwoweightsurcrclca5cdfi『0111stattcstall'Iring.:indthepullc,c,.determinethetensionforcebetweenthetWllJ”“

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第5页：半无限长带电体题

theangleshowninthefigure.Determineth(3)Aninfinitesemi-cylindricalmetaldIrecuonthatisperpendiculartotshheetcarriescurrentuniformlyalongItsaxisdirection.Alongtheecurrent,thecurrentdensityisj=ksinO.Kisaconstant.9isemagneticfieldalongitsaxis.(10scores)厂勹欠r)＞凡4,Thefigureshowsacyclicprocessofakindofidealgas.DrawthisprocessinP-Vdiagram.(5scores)pPoo一心勹bI,T。可。4飞T。v5,Abihtytest/Chooseonefromthequestionstodo)(5scores)(l)HaveyouevcrplayedJ``top“whenyou'reasmaIIchIId?TIylO叭plamit、motion.(2)Whyi3afircworksalwayscxp,Indinginncircular、加pewhcnitisinthcshy?句AbIrdlSfIttmgor1:ihighvoltugctr;IIIsicrwirC(1fpott.:l1山I300VOVWillitbL'hunourownwordl-\pl血\init

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