CJC Phy Prelim 1-2-3

8/14/2019 CJC Phy Prelim 1-2-3

1/23

CATHOLIC JUNIOR COLLEGEJC2 PBELIMINAFY EXAMINATION 2O09

PHYSTCS 9745t1Hisher 2PAPEB 1 M!lrlp16 Cholce

Friday 18 Seplember 2009t h6!r 1s minurEssdlpencrlrype Bor HB s reddnnended)

READ THESE INSTqUCNONS FIBST

Do nol use slapres, paper c ps hiqh shlers, q ue orcorcclon ilu dp on rhe Answer sheer n tlie spaces provided un ess lhs rras

Thre are lortyqueslions n lh s paper Answer allquesliois. For ach queston there are rouroossib e answsrs A! B, c and D.ChooselheonoyouconsidercorrectandGcodyourchoicensoltpencllonlheseparalesheelR.ad lh. inslruclions on lh. An$o.Sh@l verycar.lully,Eachdtrectanswelwi scoreonma&.Ama&willnotbededucledlorawonqansw6r.Any roush workins shoud be done n lhis booklel.

This queslon paper cons sls of 13 printed paoes

speed oi ighl n lree space,permeabiilY ol nee space,perm llivity ol lree space.

unlfied 610m c mass conslant

!niformly accelerated mol onwork done on /byagaso spracement 01 parllc e nsh m.Ve ocity olpancb in s h m

allematnO curcnt/volage.Transmisson coeflic ant

NA=k-G

a35,loi': Fmi1 116tr)r \ ro'g Fnl

167 10- 16

!!:lT=


2/23

;;;aa ..;:;;. n,heneasu"ipl o ; p.co . 0'. hp 4'rnaFsor lhe o derwi have an uncerlainlvorB 13% c 23%The sz. ol an arom s or rhe order or maqn lude olA losm

'iowrr a clo' Ia c1"E'6"-ii'i,i li,I i ii,".""."r"i. :"; ::"q;":. ; ;,".; .a" og *"urea oo.res oo" \^ri. o ao' o""r" o/ | " r ror ori ner. ene'q! E^orlheba w rh tme r"

MtrL/Msrar onary lsoo kq t,uck is h( rrom beh nd bv 3 sOo kg car' The rwo become enianqled aid move; :;',;:;-;;;;_:i;":.". ';, .ra-mrcd-o,h. r., .""cd. ihp M; veh.les arre' rhe.orls on)last callv W hal h appe ns ro lhe k'' etic eneQ! a^d nanentun al

rhe sysiem ol lhe rwo sale res?

'a i Dxro doib


3/23

An oblect resl ng on a hoizontall.icl on ess sudace is a.ce erated rrom resl by a conslaol lorce lrommolorWhchollheloLownqqraphsshowslhevaralionorlhemolorpowerPwilhtmel?

)

it- lz-L-An eectc motor s,equ rd lo lra! a caqe or1000 m n 3 mnutes.Whalw beils eeclrca mass400kcu0ahinesrrafl lkouqhavenica rreqhlorpower required I ls overallerrcency is 37%?

A srudenl perrorm ns an expe'imenr wh rs a rubber bunq atached rd 6ne end or a slrinq whch passesthrough a slass tubewilh smoolh openif,ss a^d h* a we qhlw hans nq al rs olher end. Theweishl orlhe rubberbunq is much smaler I o a hdrzonlarunilom circu armoton wrh anqularspeed o while rhe enslh or lhe sknA beyond lhe upper open ns or rlre qass lubeis L and lh s ponion or rhd stnq dakes 6^ anq 6 6 wilh lli6 ve ica as shown.'|o'. .,'. .. Lt

wh ch ol lhelo ow ns slalemenl(s) tare doredl?(1)ll L s kepl constanl. wl dec141l e is kopr constanl Lwil(3)whenw s increased. ewi ncGase

A mable ol mass 20 s is,e$sed l,om resr trom lhe in ola semtsd rcu ar bowlol rad us ADelemne i newlons,lhenoma dn rhe mabLe whetr lhe rnabes ar rhe bolrom ol th bow

13 Twosla6oreqlamassMmovewthconslanlspeedvinacrcuarorblotradiusBabddrthern n lhe d agram be ow

Whal s Ihe nerJorDe on eadh sra/o 6M' 2R D lMr'14 Thd d aqan be ow shows haw $egravlalona poleDtalvarles betweenpos lion w ra parl cr6 expeience zero nel lorce?

Andbjeclpadedonahorzonla plallom svibralngvenica yinsmlqUencyol20Hz,Th3ma,m!mamplludolosciatonlhalwiLlw irr lhe plalro,m lh,oLorioul lrie molion s


4/23

A p6rlico ol mass 4 kO moves wrrr simpl6 hamono dolon and ils polonlla nev Uva es wlhpos ron tas shown n lhe dia96m

whal s lhe peiod ol oscLll6l on oI lhe mass?

Amel6rbockx olmassn ato"ccomeslnlocoilactwthanolhrmela bdckY olmass2m ai100oc Hearcondudlonlaksolac6wthnolossrdrhosuftoundinss.Th.rinalequ b um lemperatu@ orlhe b ocks is 20 'C. lr lhe spec lic heal capac es ol the tro mera s a cr and d" respocl ve v lhen

1.0r lo5Pa Whon 30J olp,ossure remains cdnsranlD dedass by 50J

An idear las has an inta volume or 1.2 x 10i mr d at a pressue d{enercy s;upplied lo rhe odAs aresult,lhe nlernalenerqy or lhe q6 isA increased by 110 J B ncreasesbvs0J

Three po arod sheels P o and R are p aced alono a siGiqhr lnewth a amp and a doleclor asPQtala'-+ t--'t----1------tl |- dee..o o rc rota o'q Wh"

rs diGorion or oo d zalion is parall lo lhal ot B?A t renans unchansed.c / increasss and lhen dedrases D / decreasos and then inc,eses

2. Two waves Pand a .re nov no towads lhe ighl as shown in lherigurebelow

wr ch ol lhe ro ow nq ooreclv des. b6s lhe phsod fterence betrveen the lwo waves?A P agsoby l radians. "n." o o, a -aun'

B

,rsooi" "oo oaorlt.iola'ar'qtri1$0 ' p-hi N 1d-' o'd"s. t.a e,soe*-r ' aoo- 700-l La roodrle'A sludenl prcpares a double sllr sei up as showi b6ow Howev6r. no nlerleGnce lrinse can be\r I> r=ol'n k D-ln'a qr r'bre modvementmav beA -'q"n- n,.ip oPo,"' uo"t..ou


5/23

Th n asram be ow shows eleci c rield lneswrh poinlsPQ=OB llhe potenria ar P s0Vand lhepolenlia ala

2.1 Det6min6 rho e ecrric leld srcnqrh al the mid poinl belween l he lrxo charces below.+2.t !C "2a PC

C 72r10avmr D l4xlosVmlA balrery, dudnq irs usable lelime supp es a ensrant cutrenl or 40 !A ro a cock lo1a00 dayspy dudno rhs lme?

AsederatDrproducesr00kwbrpowerarap.d oil0kv.Thepowerrransmlredrhbuqhcabesorroralresisrance 51) wriar s rh6 power oss 'n lhscables?B 250 WD 1000wry 1.3 t 103 Om. Thewne has d ameler o.50 mm and its roigrh islu6renouohrognabre rrobewouidrghry6undan nsuLalngrod30lmes Theodhasdamererl.5

whal s lhe resislanco 0i thewne?B c4 ! ro?o

Ohl bu bs a.e conMcled lo a conslanl vo laQe d c supp y as shown in lhe d agramEach bu b dperares al no/malbiqhlness 6nd llE ammelr 1ol ieglq be ressiance)Ggislers a

The liamenr of one ot lhe bubs b/eaks !!har happen. ro rrie amderer rcad.g and to theb,qhtness oJ lhe fema ^ nq bulbs?

The ligu below shows a reclangular mela tame enleins a rs on or u^ rord magnelid red Gv6nthal rhe p ane ol rh6 meral lram to rhe masneric fed, and rhar rhd nera tran6noves al a conslanl speed wlrich gaph beow besl shows l

f l o@@@@@o000eoo@o@oooo@@oo {i

F t..--/ \t-'----- 'I Il./ \1-l


6/23

A'o uo lcl raqrr 'ed 16 or-.-" .-m;s,oru-ra a r s o.'on q20 '0 rh'6 ".; ;..",0"'..'", @!adqso rnd''oa o5.+6qdtc 0r2mv D 0.60mv

rhen,:d,m nod ft'ee lo o' ao l^ eso oa'dq o Fr o 'o" eo r_o"o'' WIP".i:ir.. -."" *r"ai-"r;pb eo "0"06."'os'eo.c "du'o drP"doro'rheFpe' A lr'ee.urenrs hare o.

aRwh ch anow besl shows lhednecion ol lh resu lantlorce on wne P ?

A.hamemoves n a oncul& olbl in a unifom masnet.lieldwhch;^eollhelollownsstabmenlsisco ecraralle lo rhe ledP' oF Io "'osdo"re hddeD TheradiusoltheciDeisdrellypropo ionalg lo lhe chaQeld poxP l1.d abe P ro' - e Pq dv'Ia' ooPhar'ed o^.,^,;..,m..ee nenasn-,o'dJdF ar'q!.'Pn r $d

what s rhe r.m.3. value or th6 alletnal ns .urnl?

'Iorrb D '6_Fdado\s"'a sor!"drp6a'.o cs' 30V 50W-"l rm.. * -. -nirca '/30 "s sh" ro db"r\eroralpoweidiss paled in bolh the amps?

'poodd.d.e 06 rlo" 1o^r n-iq er.i t*-"o" *" . r'ao Pl a d '"6,,

II

How many speclra nes or unlquo waveLenqlhs cotrespondinq lo iheseenergv LeveLs can be

A489ro s"'a'6 a e. r'o o'

^^'.; 'id r.,en.e and a,e then sroooed Lna meLal a'q61

which rature or rhe oraph enables lh s polenlia d lrerence Ioba d'iemined?A The wavelPnqrh orrhe peals on ths oraphE Th'm;,mlmwavelendtho. rh.m"rmum nlensilv;l$eX ravsproducedD rhs m nimum waveb^llh ot Irre xjavs producBd.why is aser iohl coherenr?A Theexcled oleclrons are ln a melaslable staleB Thesvslemls n a slal6 ol populal on inve6ionc sr.,Ll"a ".i"".n "n'""" tire em ned pholon and thd ncdenl pholon lo be o' rho sameo Frl"iJ* "r t" *." **sv as rhd oJ ne incdent phorons aG emted when rhe e .crionslansil down lrom a hiqher enerqv leve


7/23

whioh slar.menl aboutsenimnduclors 6 coneolta The r rosislivllv is nomaLlv som*4Et qalr ftan lhal ol mosr m6lalsg A'hole n as;diconduclorisdu.tolheremovaloraproroni r*'i- "ono-aio. n-.Ilp sani.o'o-'lo' soLe o'h a1s'e o e-l'0'3i e i:',ii ";i*i", " - " proi:,m o, oop'no an n. i.' ' sem co, d- -o wr p tuoe npu i'i66

n lhe Rulhe.rod scatle.inq xpsfrenl, mosl dl th6 apha padcles pss6d shaighl lhrouqh lh6 goldi;r ;;d6 mred which ontol etorlowns is a.orictconclu.lon lrom lhis resu r?a Mn(r.l rhe mass orlhe ardm s wlhLn rh alom_ Ps


8/23

CATHOLIC JUNIOR COLLEGEJC2 PRELIMINARY EXAMINATION 2O09

PHYSICS 974512Higher 2Monday 3l Auqusl2009t hour15 hinui.sAnswr alquesro^s on lhe Oueslion PaperNo addilona marerars are requ re3.

Wile your name and luloralqrodp on allrhe wdrkyou hand n.W le ln dark blue or brack pen in lhe spades provded oo lhe Oueslon PaperYou may use a solt poncllor any d aqrams, s,aphs o,,ough wolli.qDo noi usesraples papor c ps, hiori ehlers g re or corecrion I u d

rhe number o, ma*s is sven ii bra.kels [] al th id or each queslon or part qusron.

This quesl on paper cons sts o114 prnted pages.

speed o1 ghl n lree space,permeab ry oi lree spacepermiltivity ol free space

unified alomic mass @fslaft,157^rO':?t;

NAG0

un iomly aee erared mol on,work done on/bya gas,Dispacemenl of pan cb n s.h.m.Ve ocly ol panic e in s.h m.

alternal ng currenl /vo laOe.Ttansn ss on coelfic enl T

!!9q

3r:m{U E)


9/23

A di6c in a DVD playr is olating in a hoizonla plane at a rate ol 1 1 0 rovo ul ons per 666nd(a) calculato [s anqu]ar v ocily. t2l

The radlus ol Iho disc s 0 060 mAngularveocity:...,.. .. - ...sr.

For a poid on th. edge ol th d 3c 14

(i)Sp66d:

show that rh @nldpel6l acclrat on s appoimately 290 m34. lrl

)

on rhe d"d orovom s+ Lh a o'aol or a ooa'ns r in w rh, s Fe rpnl o'rclerc c;r.; ora oo'ntadistan@ /iom Lhe cent,6 or Lhe d s. t1l

.t_E

A \Decr. ol oLs. d mass 2 o. 0-' "s is J' _1 ro T edo6 o' he o\. a oo.l olit calculale llie c.nl"pelal rorco on lhe spe.l nl

(D(iiD

Cnlrpelallorcor '. ... .. ." " Nshow rhe dnodlon oi lhis rorce by an an ,labelsd A on lhe diaohm lllth. seck now be@mos delached shN the dicuon nwhich imovs i1limmeilialely aileNads, as an arow, label!d B

)


10/23

Fqure 2.1 shoN the dsplacemenl time q,aFhdspad6d manua y and lhen a owed 10 vibrar ror lhe centre of a loudspeaker cone when

Fqu.e 2.1Expain the lealure whch shows lhal he osc alions are damped I'J

(b) (il calcualelhe natuE rre t2)

()Narura rrequency =

Calcu ale lh maxmum acceleEr t2|

() Draw a s,aph lo show riow the adce e.ardn or lhe body dhanoesw lh {ime lrl

(c) rhe sraph beow shows hdw rhe ampilude dr rhe done vaies wrh lrequency (rhenequency response sraph) uhen hainq cuiienl ordlre,nl rrequnces bul s fri ar ampilude lo the ldudspeaker.

Sketch and abe onrhe qraph above lheelleclol:1) lncasing lhe dampinq (abellhsgGph. A);1 ) Dedreasnq lhodamplnq (labe thsq,aph B) I2l


11/23

3 (a) DeJine Eleclrlc Polenta. 121

A 6.! oa.rive nucleus emits a 6.s Mev alpha pa icLe. The parlice then ac6s loward apan oi charged pl6les lhat a@ 3 cm apad as slr@n in Fgure ! 1

0t+Figure s l

O caoulale the speed or lhe apha panice. t2l

speed = "(ii) ln Foure 3.2, daw lhe e eolid li6ld ines and lh subsequenl palh ol lhe alphapartcLes I enl.rc Ihe Gsion blrvaen lhe Mo p ales. P]

0t+

{iii) Calcu al6 lhe rorce on lhe alpha paticle (f nt The alpha panice has 2 t3t

Force=.... ..... . .... . Nosrroel _F pla 6q o 5 >' ords| " Jo' a pa'ire ca,sPd b. he ni

chang6inmomenlum=.................. kgmsl


12/23

Lighl is indidnl on a cean melalsudace in a va.uufr. The haximuh kiielio eneqy KE.,,ollheeleolrons eieotd lrom lhe surhce is mesured lor d fferent values ol lhe lrcquency f oi thoThe measuremenls are shown plolled beN in Fioure 4.1.

re.- / x 10'"I

5.0 5.5 6.0 6.5 7A 1.5 8.0

!s6 rh6 qraph ro daremint2)

Pancks@nslant............................. ........Js The B eclrons a @ereraled in the e eclron cun bvaDolentarditfere^ceor75V.

(it lheMr[ runcl'on o LhemeLa. t2l

Wolk luncton oi lhe mela :.................... ......,.........,.....,,. JExpla^ b erry how E nsreii! pholoerecrdc rhe6/y &ooufis tor lhe lacr thal no eteolrons areomilled rrom the sunaedlths mela! rdelrcquencyorthe idoidenc6 ain valu6. l2l

An expeimenl is atried oul n wlrioh a beam ol e ectons s scafteGd iiom a sing e niokeoryslal, Aschematcdiegram ol lhe apparalus sshNn below.


13/23

1i) Deleffiin. rhe wavelenolh associaled wilh tho emrrcns as pGdicled by the de Brocliet3t

Wd\ele' qihTh nunbor n ololedrcns scatisrd ears{ond lhrouoh an ans 6 e is m.asuted Th6graph be ow sho the varlal on wilh angb e oJ n.

(i) Sugqesl how dala lrom lhesraph can b used lo supponthe de BrogLie hvpolhesis.nt

5. r lorwisn ro oet rl6 TaYirrT pode ldlrp roa sajabdlelloa'ePLIraadp ane. w'];l5ol or'essldn.ps.oud rl'e dopld e hdva?Ar lirst sioht a smallresslance seems senslble. because then a large curenlwilliowl"i,.ri,ir""i"v a,"*.0 " t"tse curent rrom a suppv lowers its voraoe be@lse ollhe supply 6 interna resisla.ce.n te efoeme c6e ol zero resislance, a very arqe clrent mav row but aLlthe powerlransjered heals up the SUPPY I

Al lhe olh4 6xlreme, a arge res ddce means tt e cLfenl and so only a smal power

roJreJ r sno# a ooter clpp v o' e m l Ea o nlerra esstance a 6-npcred@r"ia,".i.--"n rcanoe. owr lrar rre raiarr powe is dns'eredwrPnn E ri s mr awl's msso e ro o! ar ar F ci'ca d! ce Io are rr' ene'*.ir_"" ".""..ppr. urt " r"cav or ac suppv -arct ns can oe D or dedbvdAn exampe incude matchinq outpul rslslance ol a. aud o amp il er lo lhat ol lhe.no nolherea..oJ s.al' r,erceso ata soae"l6 oao esisb' F q'ili.".. -"."in," *-t, "s rra,'e o N F whe e N ^ Ine dr'o or IJ'ns o rl e;;;t;;i ; -;"" ;.''"- oary coi o' s na.s'o re' rhpdFrai> a'e sho*- t'r- l----'-lU^ -il(. "f,L FsLres2(a) w ls down an oxpesson lor the curenl IthocirculolJgure51 11l


14/23

(b) (D Showlhat the power delvered to the load is

Show thatlh6 power suppled by lhe batery is given bvE;E

t2l

(D 12)

tc)

0 compbre the lab e below: i3l

. (il) P ol P1. P2 and P3 againsl RLln the graph paper below. I3l

0 3 5

(i) Delerm ne lhe maximLn power delvered to lhe load rcs stor BL lrom thegraphs that you havs plolted.Maximum power: ,... ,. . . W.$ate and explain whetherthe law ol @nseruaton ol enelgv holds lorlhis

t1l

(v) 12)

r., r r Assumrno $artneldldorre s oodoerne_ sr tedoM e oeseors ror [2]' revohaae'alio, vpv>ard lqe cure' I alio p'6rn lermsol N lp ele'stoprimary and s to secondary (ircLils)

(i) lise thexeG*lms n {d)(l)to show thatlha alio oi lhe supplv to load t2l

() (i) Suqoosrarod donlo roc{.uIi ioure52so trlhedc sQnalmav I'beiecrihed nio a dc sonalusns on v diode(s)

{i) Shre on5 disadvanlage oi lhe rsculied d c signalvou have desiqn6d n Flie)li).TIiE END


15/23

Namei..-..-......-..... ...

REAO THESE INSTFUCTIONS FIRSTW re yod iane and rurdra qroup on ar rhewo* you hand inWliIe in da& bue d brack pen n rhe spaces provded on lhe Oueston Pap6r.You may useasofipenc roranydbsrams. q/aphs or rcuqh wolk nsDo nol use slapres, paper c ps hrsh shleG, s ue orcotrecriontud

Answeranyndoq0estonsYou ar. adv sed lo soedd abDurarhe number or ma s is ovn in brackars []ar rh6 nd or each queslion o, panquesliotr

Th s queslon paperco.ssls ot l9prlnted paoes.

CATHOLIC JUNIOB COLLEGEJC2 PRELIMINARY EXAMINATION 2OO9PHYSTCS 9745t3Higher 2PAPEH 3 Thursday 17 September 20092 hourscaididares answer on lhe Ouston PaperNo addl onalmaleras are requncd

speed ol ighl n lree spacepemeabiily of lree spaceperm lr vity ot iree space,!nl ed alomic mass constanl,

the Bo lzmann constanl.

Lnif omly accelerated mol on,wo* done on / by a gas.Dspacementoi parlice in sh m.Ve ocry oi pan cb n s.h.m

atehating cude.l / voltage,Transm ssio. coell ciefl

885 10': Fm =(/(36n,,10' Fmre11,10llr;

N/.G0

!r!_993


16/23

S..ton AAnswd all lhe queslions in lhsseorion

u1p o c b rn'1q b- diT rFr wo ld j-a r da'6 asi.trneroeobro.arn.hevilr "c,'re.. nj nps lo olraro llh! a naow o .h" si{ iesi'dor s 2231 1om re o'ound a_o h- \nel ws plad 1 .0 m abo! qround evel.o Deb.min6lhedu6l6nthviclimlakeslola lo lh6 sarelv nel paced al ihe bass ol I21

Duralion= " " s" A _arsoeedoo 1e16ls e e p'_ rd/crl o unp o' ol e buro_o I ha 2sa ty n6rwas 5 om away hom lhe base orihe bu lding)

Speed=" """ ms'The saloly nel is elaslic n nature ahd requirs 50 N lo depress l 0 mm Taki^O lho aveGse mass0 carcu al6 lhe averase d6pr*ion ol lhe ner whn lhe speed dr the vict m llrsr achos [2]

Ave6q e depresslo n = " m{iil oeremine lh6 avraqe loroe lhe n6l 6rrled on lhe vidi m lo slop h s lan t2l

Av6rage loroe = ......... .... . N Hoal supplied = . . . . . . .. .. J

bov suqq$l lwo rMlorc manuracireG consder wri6n [2]rhey choose a pan;ul4 daliallormak ng lhe salelv ner'

2 (a) Expla i whal is meanl bv h{o gases having rli6 same intona enerois IA

' nclvo- ' eo 000322n aia reroea r e o r00 K ed dlap'asi'e I6 oards oa "a o rPo"t'l-" ii-" ma r..p."r*" .r rn" sas Express vod answer in desre cors us l2l

Fi^a temperarur6=..... . .. .qC(l) rh work done by lhe 96. t4

Wo'l done by gas =I iil lhechano6in inlehalonelgy t4

Chanq6ininlema 6neqy = .. .. .. J(iv) lh heatsuppliod lo lhe sFtm. P]


17/23

(a) Disr nsu sh beb{eeo poiont a dirlorence and actromoriv lorc6

,,,,,''''' ''''' ' ' ',,,,,,,,',,,,,,, ,,., .... I3lFiqtrre 3.1 below shows a polenlomelerwhich shows a ba ance poinl alZwhen swilches Sr and S,

(i) Assum nO lhat both ceLLs have neg gible 's slad@,lind the potenila d rrerencs a.bs xz.

Honc6,I nd lh e balanc lnglh XZ. I wire XY is 100 om lonq.t2l

t4z= .................................................m.

(iii) D6t6m ne rhe n6w balanc l6n0rh xz whsn Ih6 swlch s, is cosed and $ is open.

Xz =......................................................06. t21(v) Deled ne, tor lhe newbaance lengrh xz, rh curcntthrough th 30o Gsslorwhen lhe swiichS, s closed and S, sopen.r= . ..... ................................. A I11

Ajunclion is lomod bolften s ices of p tt"e and oi nrype semioondudlot matoia, s shown in Fiour

Figuto 41on rhe liqure abov6, dhw an arcw lo show rhe direcl on ol movenentol eelrons as lhe h{osicesar brcuqhr inro contacr. l1lD6sc b the orgin of the dep elon req on atthelunolion.


18/23

On the lgursabove, draw lhe symbo lor a baflery conn6cled so as lo incroase lhewdlh ol lhod6ooto;,eoion. I11Ad ohmc Bsislor is now mnnecled in se es lo lh6 sem conduclor d oda n the cnouit bo ow

The inpul signal h6 lhe characleislios 6 shdn in the liqure he tu:

(i)'skeichth6outpulsignalamssa16slorpladedlnserlswiththesemimnduclor' f1t

\i'. si! . e /' v2"qcns \6 ss ao' lo l' " o 'lo.lsig1al Irl

(iiD calculate lh6 averaqe va d6 ol lhe v': across lhe s sio..

.\,2, =.................... . ..- ......................... v t1)(iv) Hene, calcubre iho Lm.s. va ue ol Ihe potsnl a dillerencc ross Ih6 rasislor


19/23

s.ction AAnswor two queslions n lhis seclion.

The E6dh lakes 365 dars io olbir aiound lhe Sun. The mss orlhe Sun is 1 939 x 1030 kq(i) Calculate lhe ansu tu v ocily ol lhe Eanh around lhe Sun t2)

Ansu arve oDily = Gd sr( ) Calcu ale lhe d:slance belwen llre Eanh andlheSun. I'I

Dislance=...... ........... m( ) Sraie the assumpr on made' nl

Alth. crr. 01 $e Sri, rwo prolons ar6.onl)Ed locreale heiun 4 aid en-"rSy in sev6r6r rwoproronscoflilnetofo,tr,2dc!le,i! /hydna.^ alon willr oio n.Llidn) aposxonlsifl:arloee.loi $L!rrl apos:ivecrrtrrqe)tid:ierrrno2 A Dt.lon and a deule n 3alom llwop oronsvlhone ielrront and aqamma ray3. rw6lieliL/d3alomsco'.b'r.rolorraheli!n4(Lwoprol.isa^dlroneulrons)

(i) G v.n lhal a nautrno has ng libl mass, and a postron s denlica lo an elatroner.epllor lscharce calcu ats rheonercyres6od inlhelusion ollhelwo hydrogenaloms in lhe rGtstep. Leove your answer in MeV l4l

Energyreleased= .......... .......MeV(ii) wile rhe equaron oovsrn no rhe lusion reacr on n srp 2. trl

sralerhe aspecr or rhe rcadion in (ii)lhar shows the prcducrs are mor srab 6 than t1l

{iv) suqqesr a 6ason why nmsd rusion r6qun6s strch hqh psur6. ev6n rhough rheprodudts are mo 6lab e lhan rhen reactanrs t11

lh6 ha I lle oi'?loPo s aboul2I years.O r:''Po dcays to:"Pb, slate lh6 nam ol lh6 hd oactiv parlce em lled tll(ii) D6l6m no thedacay conslanl oi ?r'Po in yarsr. t2t

De6y co^qani= .. . . .. yea sLt0


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(iii) A lab is qv.n a sampl ol 105 g ol'zroPo. llN many g6ns ol'?roPo woud be 6ll l3l

M* -................. ..-.. S.lda, '0'^6 rFps Jhe n 'L6ons rer0ons a'o o'oro-3)roolhF ov46trhs re s.o! 'ap-sve betseel o0l0-ss;oaesr .h" n^hdsr by w_.r fi. helrrovercoml^q lh6 stroru nucLe4lorca. nt

ll

6 (a) Fgur66.l shNs a disp aoemenl'dislanoe oraph lor 2 wav6s a d B, ol the sfie irqrercv anda;pltude. Wave A k taveLinq to th6 r]shl anli wave a ls lEve ns lolh6l6n

:.

() State lhe P ncipls ol Sup e lposllion t2l

(iD Li rhe peiiod oi aoh wav6 b li oi th6 axes below, skeloh the oaptu oi the sullanto sp'areref or'he wo wav6s1. arlho instanl shown (use a soid llne and lab6lgraph 6 \)2. arthernsranlshoM+ +r(us6adolledrin6andlaberoEph asl:)3. althe rclanlshown++r+jr(useadollodlineandlab6ls6phas!)

n each 6e. nd cal. c oarlv ih 6 m aximum d splaoemen ls an d the positio E al which


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(iD waves a and B are sound waves. Daw a qraph to show lhe rcsrltanl prssure variarionwhenihet{owavessupe4oseairheliElarlshod,. [email protected] ndialeolea ythereg ons ol compros on and rarelaol on. Take vecro/s 10 the shtaspNilive. ta

(b) Flgure 6.2shNs aYounos Double Slils experment. A doub6.6lil (q dd S:)is p aced inlront ol a narow single sit A shuated in no ol a monodhromalic iqhl sourc6. slil Alsequ dislant lrom slils q and S,.

(DFsuG 6.2

Two'sourc nt6fi6rnce lring6. using lghtcan onlybe obtained ir liOht tom lhe ttrsourms s coharenl. Expla n1. rh6 man nq ol lhe lem coherert I1I

2. why in pctic, int rlercnoe l nqescan be seen only I lislil rrom a sinq s sL[ is t21

(iD Sussest a mddi,ical on Ihal dan b made lo lh.tup such thal lhe single slll A is no t1t

Point Q i.lhe posilon ol lhe seoond oderdarklrinse. $are,ld t6rms oi lho wavelenglh,1,lhe palh d llenc. boh{6n th waves lhal suprpose al poldl O. 11l

Palh dfielence = ''','''' ,''' ,,''' '' ',1


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ll is connected lo a 12 V d.c. suppy dr neollqble intema rasslanc. Fiour 7.2 6hoh thewnen rne moro' 's sdrhed on

F gu.7.2( ) Eslimale ths marimum valuo oi I-- t2l

Eslimaredvaueor rD " A. tll(r ) Exp ain why rhisvarue is an.stmar6.

..t11

O iss gndually lrcm zero lo ils fra hum value nslead oi rsing immedlalely lo ils t2l

t1

(ii) dropssradually iiom P lo O t2l

( ii) bcom os slady alons OC. tll

(d) whar s rhe maxlmum momenl act nq oi lhe co due to rhe cuiienl in the co whod I isrolat ng at conslani speed (l e art, I - t?)? 131

Maximummomenl=.................Nm(e) wlien lrre molor is switched on,lh6cuiint s so larc. such lhal t may bu.n outtheooill lras beensusqesled lhal a bsstori6dmd in s6 6s wlh theo lo reducethe curcnt nthe d rcu L Exprain why lhis ir mothod nol pracii. l2l

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