SIV]KGREEN ROAD STPI}I PAPER 1 TRIAL EXAM 20,10 (1 HR45 I,IINUTES)Values of constantsSpeed oi light in free space c= 3.0ox1o3ms l

Perrneabrlity of free space p" = 4 rr x 1o_/Hm i

Permitiivity of free srace €o = 8 85x10 1'?Fm-l

= (1436 n)) x 10,, Fm-jMagnltude ofe eckonic charge e = 1.60 x 1O-1'gC

Planck constani h = 6 63x10 34 JsUnifled atomlc mass consiant u = 1 66 x 10'?7 kgResl mass of eleckcn m" = 9.1 1 x 1O 31kg

Resi mass of proion mp = 1 67 x 10 '?7kgI\,4olar gas constant R = 8.31 JK 1 mol'1' Avogadro constant L, Nr = 6 62 * ,Oz:Ino,'Boltzmafn constani k = 1.38 x 10 i3JK_i

Gravilational consiant G = 6.67x10 rr Nm'zkgtAcceleratjon offr3e fal g = 9.81ms-'?

'1 .A firefighter 50 0 m avlay from a blrrning building. dJrects a stTeaTa of waler from afirehose at an ang e of 30.0' above ihe horizontal lf the iniiial speed of the stream is 40.0rn/s at whal height does ihe water slrike the bullding ?

A 18.7m 8.21.0m C 22.5m D. 25.5m

2 A ballp ayer catches a ball 3.1 s after throwing it vertlcally upv/ard. Wiih what speed didhe thrcu/ it? { n m/s lA. 12 B 15 C. lB D.20

3. A rocket. inilie l,v ai resi. is l red vertically with an upward acceieration of 1O m,/s'? . At analtilude ol 0.50 kn'r the engine of the rccket cuts cff. What is the maximlm a titude achieves?A 2.1km ts i gkm C 1.6km D. 1.0km

4. Twc equa! masssiarsmaintainaccnslantdjstenceapartofS.0xl0r'rnandrotateaboui midway berreen thern ai 3 rate ci one revc ution every 12 6 yeai. lvhat rrust be themacs + o)-- at,.' .. 1te-.:rt6! t_ slA 5.5x1C"kE B 96x1ar6Kg c 20x10:7kg D. agxlorikg

5.A 7a0okg helicopiei acceieraies upward ai 0 52 m1s: vr'hile liftinq a 1200 ka car. What lsthe tens or in the .ableilgnore ils rnass) thai ccn.1ecis the ca: to the helicopter?A. 1iox1c'N B 124x1orN c 2.50xtc4kg D 3.4x 101K€i.-

6. A 2 Ck! block s des do,rjl a p anei inclined at40'wlth the horzcntal) at a constant speedof 5 C m/s Ai what fate is ihe gravilaticnal force on the b ock doing work ?A.4o'r'V B.48W O.63W D 81W

7. A2.Ckg bock siiCes down a iriction ess incline fforn pontAto point B A force P ofrnagnliude 3 0N acis onihe block bety,een A and B as snov/n inolagram below PointsAand B are 2 0m apaft. lfthekneticenefgyoftheblockatAisl0J whal is the kinetic energyof lhe b o.k ai B?

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A 17.) B 2SJ c.32 J D. 35 Jthe magnitude of the force exerted on the

D. equal to the rnagniiude of the force exerted on the lift floor by his fset.

9. T,,vo bodies P & Q ( of equal mass) iTavel ing towards one another on a level friclionlesstrack at speed Lr afd v respectively, make an ejast c co l]s oll.At some instant Curing the collision P is brought momentari y to resl. What is the speed of Q

D.Y, (v u)

\,vhere R is the Edius

D 0,98W

B. When a man is standing in an ascending lift,man s feet by the floor is alwaysA equalto lhe magnitude of his weighr.B. greater than it would be in a stationary lift.C. equal to what il would be in a stationary lift

13. lt is lmportant that a car suspension systern should be crittcally damped.

The equi bri!m helght above lhe ground of the bod!!/ork cf such a car ls H. The bcdy of

the caa is faised to a greaier height H & reieased al t me t = 0. Assunre ihat lhe car tyres

remain in contact with iie ground ihicL.rghout & there is critical daanping

4.. zeto B.2 (v u) C.vu

10 On the gro!nd the grav iaticna force on a satel lte is W.

What is the graviiationalforce on the satellite when at a height R/50of the Earlh?A O 75W B 086'/ C O 96W

11 The diagram shcws 2 po nts X & Y at dislance L & 2LfromthecentreoftheEarth.Thegravitalional poieniia atX is 8 kJ/kg

2lWhat is the gain in ootenliai eneigy oi a 1kg rnass when it is moved ffom X to Y ?

A.,4kJ B.2kj C+2kJ D.+4kJ

l2 ahefss:.C::lLcl!'ra:er,:rahafbcrissjnpeharnrcnic The depih va-ies betlveen'l.0rnat ow ild. & 3.0,x ai h gh tLde Tie t lre bei\/een slrccessi,ie ow ides s T 2 hoLrrs.

A boai. vJhi.h requi.es a rn nimum depih of!va13r of 1.5 m, approaches the harbor at lowtde.Hovv iong w Mhe boai have io walt before eniering ?

A.20hrs B. 15hrs C 1ohrs D. 0.8 hrs

rY'Eadh

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Which graph shows how the height ofthe car body above the

ABground varies with time ?

heighlH H

0i

-

0l

D

haightH

B a longltudinal wave

D a siationary wave

Iho

holght

H

Ho

0

14 lf a wave can be poJarized, ll must be

A. an electrcmagneiic wave

C. a transverse wave

Ha

15. The fraquency of the fundamental mode of transverse vibration of a stretched wire 1000

m; long is 256 Frz. When the lvire is shortened to 4oornrn at the sarne tension' what !s the

fundamental irequencY?

A 640 Hz A 4i6\z D ',e2 Hz

16 A resonance iube open at boih encs & respondlng to a tuning iork

A alu/ays has an odd nurnber of.odes + anilnodes

B. alv/ays has an even nLlmber of nodes

C alv/ays has a cert"a aniinode

D ahvays las a .e4tra] ncde

17Agasundergoesthecycleof pressure&volurnechanges W' X + Y+7 ' \Al as sho\"/n n tie diagrarn

height

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3

2

What is the net work done by the gasA 200J I OJ

18. lf the pressu.e ir a gas is dolbledV,." change ?

A. !2 8.2

fil3

?

c 200J D.6OOJ

r'/hie ts volume is held conslanl, by what faclor does

c 2..i 2 D.4

sr,rn at a ternperature of

D 6.1x103m/s

34-me/lo'

2

volu

l9.Calculate lhe rms speed of heliurn atoms near the surlace of theabout6000h IRAUoiHe 4jA.2.5x10 rrs 836\tOrs C58rtO.ns

20 A uniform , veriicai\ri.e js sii.eicheC bV hanging a mass from its lower end Which otlhefollowinE does nci affect the sirain ln the;tre?A. the stressC. rts cross seciional area

2i Energy is condircled arong a we|-ragged metar bar of uniiorm cross sectronar area A a1 asteady raie Q.The temperature d;ileien.e belyreen irro potnts a distance d apa.t on the axis of the baa isPropoftionaltoA. Qd/A B.OA/d C Q/Ad D. QdA

22 Trro thermaiv ccnCuctrng blocks are maintatred al lempe.atures wtich dlffer by 20 K.The b ocks are rcir-ied by 2 c),4indricar bars each oi lengrh 0 40 m & rnare irom a miteriat otiheifi.al corciuctiv,ry 25 'y'r',m/K lhe cross,sectional areas oi tie bais a,e LOx 10. ;, &4 0x 1J I n''? respectivery _ihe remainder ofthe space berw-een the bro"r. i" irrrao *nninsulaiing rnalerjal:s shorl/n in the djag.am

B. its unstretched lsngthD the load applied

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I block

t'.r

What ls trie rate of transfei of thermal energy beiween the two blocks?

A.025W B.0 31W c.050l/ D. 0 63W

23. ln an exper ment io measure the lhermal conductlviiy of a good conCuctor, a long test

sample is used so thaiA the heat oss can be neg ected

B. ihe steaCy stale is easiLy achieved

C the heai flow is parallel throughout the samp e

D. ihe tenrperatuie djfference between the 2 ends of ihe sarnple is sufficienlly laage

24. The diagram be ow sho\ /s 3 point charges +q +q and -q ai the vedlces X' Y and zrespectively of an equilatera triangle

TheeectricfieLd strength aiihecentrod O of the iriangie slnihedireclonof

A.OS BOT c.oY naz

25 A go c .u:lelrs ,_ad ,ts i ) : r3presented by ihe syribcl "' Au-, Taking e as ihe

ele..entary chaige & .. as ihe permlttivliy of free space what s ihe electric field skength at

the surface of an isc ated gold nuc elrs ?

A ;;F19le

B {^./ C. 1",,t' D 4i..r.-

- . . -/- r.t-;- --- -: .^-'l'..: --,-.--:, ' -: j']--

*,'-l-: "t" q'''" ;-!---.)ffi -

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26 T!',?c ceirs of EMF Ei and E2 and of negrigibre intemar resistance are connected with 2variabra r--sisto.s a:: shcyr'a in lhe dtadr:n1

€6lvar&rleisWhen the galvancmeier defleclion is zero. the valuesthe valle of the raijo E),/E. ?A P/(P+O) B a/(P + a)

of the resistances are p & e. Whatis

C. (P+QYP D. (p+O)/a

27.,Vhar rs rhe trre en:rgy stored i' the qrouo of aapa.itors shown belov/ if lhe charge onrhe l0 !F capac:lor is 0 g0 rC ?

A. 29 mJ66mJ

28.Th.ee capecriois

f- F- -rLt'1)lr-

Lrrl2o!Ftf-

B 32mJ

aae arianged as shown in the djaglara

i tur' 3.oLF I so"ti=-iF--1-1l--+- 1l- -._-lllY _lWhat is ihe C," the eiiecii/e capacilarce bet 3en X and y ?A2cpF s 3cpF Lt 6o'F D, 1,1 PF

29 The gr€lh bel.,.v shcv/s ine varjaitcn oi poienrial dtfference V across a resisior wtthcurient lflowinE thfruqh it.

C 61 mJ D

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When the current is 0.23A, the power supplied 10 the resistor is

A. O.5JW B. 1.06W C 212W

4.2

32 Diagram 1 sllows an aiLr.iiniL-rn

Diagram 2 shows the variaiion wiin

region ol rnagneiic fieldXXX

o.

4.1

roc

D 4.23W

curaent. Which of theacting on the eleckon ?

30 An eleciron is moving along the axis of a so enoid carry ng afollowing ls a correci stalement about ihe electrornagnetic forceA. The force acts radially inwards.B. The force acts radialiy outwardsC The iorce acts in lhe direction of n-rotionD No force acts

31. A horizontai power cable carries a steady c!rrent in an easlto-west direclion i e. into lheplane of the diagram Whlch arrow shows the direction of the force on the cabie caused bythe Eailh s magnelic field, in a reglon whe.e thls field is at 70' to the horizontaj ?

Earthb magnelic ligtd

diaqr3m 1

\ /hicn graph best shov.,s the vaIation wltn t

movlng at r ghi angles to a uniiorm magnetic fie d.ofthe distance s from O

diagram 2of the e.ra f. E induced in the rod ?

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cB

34 The cjiagram snows an iron_corec translormer assumed toof lre secoldary lJ.rs ro he D.i.lary r ,rrs s I 20A2d0V a: sLJFp/ ts cornec-ec lo{"epr,r:rycor, & a6O CsPco_Cdry .oi Whrtis t.e cL-e-i t1 tre prrray co:J ^

At \,vhich vaiue oi t is the magnitude oflhe ernf inducedA lrns B 2rns C.3nrs

35 T!^,'o identicalsolencids S, & S, arethin v,,ires so that they may swing free y

33 A_ e.*.f. ;s rnd.,ceo in a w,Je srb;ecreool thls iield varies !v th time I as shown

srWhen rne -

^tt. a . scoseo //,tat haope-slotle

A. One'.'ns t1 a ctockwtse Cireulon & r:-e other inB Jhey rnove towa.ds each olherC. They ncve away frojn each otherD They move a1,vay irom each other sideway

to a changing magnetjc fleld. The flux densitv B

in the vvire a maxlmum ?

D 4n]sbe 100% eiflcient. The ratio

resisfo. is connected to ihe

A, 4OA B.2.AA c 014 A D.010A

rLcpendeo.oa::a.,v 8 syrrret-lrdlrv oy four,ongas Shown tn the draar:m

solenoid?an aniiclockwise direction

s?

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36.The clrcuit dlagram shows a fuTl-wave rectifier wiih a smoothing capacitor'

I

load

The currents l. and lr van/ wilh time as shown

the variation wjth time of the currents l: 'below Whrch of the qrachs best represents

curreni in a resistor What is ihe mean power dlssipated

B (nraxlmum Power)/ \2D. lmaximun Pov/er),r2

Do

0

0

"l"nl-lf[-Ir

37.There ls a slnusoidal aiternai ng

in the resisior ?

A. (maxlmum cuiient)'?/ \2C. (.aaximLrm cutreni)2 / 2

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33.lJJua vro'et rays dif,er i,on- X-.av< ;n that Ltrra_vtoJet raysA can. )+ h9 difiraaie,JB. cannol be polarised.C dc noi affect e photographic olateD have a iower ftequency.

39 A sound wave of araplitude O.20 rnm hintensrty or a sc,-.nd vra; ;;,;.";; ;;J::: :n

if tensitv or 3 0 w7n'? \r''lhat wirl be theA 12w/m, -e.

i o*;! - "-;uencv whjch-ha.s;: ,"*i. ".1:;r1#, t

a diffraction grating ofbeam & the dhection of

40. ) bearo,rrorocl.o.nrlc.rqi,l o.wa;e,-.rglr I ta.ls "orra,.yo"'ne soac rg d I O ts r4e dngte oelweer lhe seco.d_orde- djfrractedil^e,n-,oer' ighl w.al ts rtevatJe o.s:n H ?a id e dI c 2\d D.2dt A

41 In the c rcLrrl ;hcwn n the diaqram the operational amplifjer may be assumed to be ideal.' te cur.c.: ,n tr i r2 ( o ,rsisrcr .s L rv"at rs tre cLrrrenr ;' ; ,,,5;r": ff:"lHr:j

-6 I c. l DI1l Ltqht of Freq!ency fradtaie;:he 3urfaemrlre; ete:trcn:s i'a"i;l;;t . p;";ii:::-1la r'elal

.lf the maximLrm kjneiic energv of the

A 'if -K B /,,/ j( "on"tant ihe threshold frequency oithe metalrs

t' C x-hr D KUe.l A b. ,.r -r tr:- ../,1 pr/,-- D a .d wdretFnn.hv!na1 s tne lorce cai lhe surface?

velength I is perpendicularlv incjdent lo a surface.Ja = spesd cflighiih = plank,s consta.u

U5

44.A "rycre!en a:ci :bso,bs a

sraie to rhe fist exciled siaierhoian aniti as a a?sllt an

lf the nrh e:ergy ievel

a. !.

eiectron s exc ted iromci ihe hyd.cgen at,Jm

the groundis given by_ ttair. = - ev.iie pfoton enerily absorbed js

A. 3.4 €V B 102eV C. 135eV D. 17.0 eV

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\/

45.Whlch of the following siaiements is nol true of Bohfs atomic model?A. Radj?iicn ls em tted \r/hen an e eclfor oibits in the alowed orbll.

B.The ang,Jlar momenlum of an e eciron in the allowed orbit is an integral multiple of;!21t

C.The eleclfon in the orblt nearest to the nucle!s has the lowest energyD.The Coulombs force bebteen the nucleus and electron maintains the electron in its

orbit.

46.The dlagram beiou/ shows a speclrurn prod!ced by an X-ray tube

,, KBlntens ty

t

A -''

f the acce)eraling vcllage is rajsed

Wavelength

A the value of l-..,,,, will decrease

B. the value of i-..," will ncrease.

C Thewaveengthsofthecharacteristiclines (.- and r(-r vv lldecrease

D. The w3v3lenglhs of ihe characierisiic iines (., and ,(-rvlli lncreases

47.\ /hich ofihe fc lcwing is tiue of laserstA Only red waves are Produced.B lhe waves produced are longitudinal wavesC The oirtout is prcduced by radioactive de.ayD.The o!ipui is prod!ced by st mulaied em;sslon.

48 One Gf the fusion processes which occurs at the Srr ca: ae repiesented by ihe equation

below 2H, . :H, - 3l-te, + rn.

Thls process onl'! happens ai very hlgh temperatures. lvhich oi the iollovring slatements is

the reason ior the hiEh temperati-rres recuireci?

A. 2H- nuc eus is a 1!9ht nuc e-rs

B. The prccess inv.h.?es hesl absorptio.C The q,Jartt-v cf :-1. .!. a: ,,,hic. ex si n the Su. is :rirrm:lD. in. Co o-r '. - . .i ',"' belwe.r i_e - ' --le j g' : :t

49. Ihe nuclide':z:Ra.. h?s a haif-llfe of 1622 years Whai is ihe rate of decay of '1 09

sample ol ihe nuc iie?A 3 61x1oiosr B 927x10'osl5O \ lhich of the foliowing forces has the largesi magnit!de?

H F eclrostatrc lclceD Nuc ear \r'/eak fofce

C 2.q6' lO ' D 6.da( lC': s

A. Illagnetic force

C. Nuclear sircng f.rceEnd sci(sc( ocT

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SI!1K GREEN ROAD 3O MINIITES

Speed of ighl n free spacePermeability of free spacePermitiivity of free space

Nlagnitucje of electronic chargePlanck constantUn fied atom c mass conslantRest mass of eiecironRest mass oiproton[1o]ar gas conslantAvogadTo constaItBollzmann constantGravitationa constaniAccelerairon of ftee fel

c= 3.OOx103mslp.=4nxlo-iHmls" = 8 B5x101'?Fmi

= {1/(36 r)) x 10.? Fm 'e=1.60x10[Ch = 6.63xi0 3a Jsu=T.66x10?rkgm"=911x103-kgnri = 1.67 x 10 ?rkg

R=831 JKrmollL, Nr = 6 62 * 1O:: to"k=T38x10'::JKlG = 6 67x10 1i Nm'?kg ':

g = I 81ms'?

Section A f40%l : Answer all questions in this section'1 A neuiron of raass m moves lvith a speed uo lowards a go d nucleus oi mass 197 m wh chis ai rest. After coli sion lhe neulron moves in the opposlle d reciron lf the co lision is elastic,

/aitLe.p-.0 oi to go d 'l_,le-, a' e co tc ol

ib) the ral o oi the kr.ei:c ererg! of tie neuiron io ihe kinei c eNe.gy oi the goid nucleus aiier

t6l

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2. A ca-chaiges iis rcloc iy fion 30n/s due Easi io 2Jm/s ilue SoLtih.( ) Dralv a veclor diagram to sho1,,r' the in tial and f na: velocjt es and lhe change in veioclty

(l) Ca culate lhe change I. sp:ed

(ii) Calcu ate lhe change n velocrly

t5l

3. A sate lile orbits the Eaiih ir a c .cLt aT palh of radils r The period oi lhe orb t is T.(il Fjnd the acceLeiat on of l:re sateiLite ln ter.n cf r and T

tsl

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(b) The \,vork ihe qas does and

(c) The heat added io it

5 (a)ln the figlre below lf'J,u=22y. howmuch energy is storedrnthe 50 uFcapaciior?

a ?'p', 50dc _'J 25U' t

.i Ore mole oi i\, gas at 0' C ls heated 1o 100'C at constant presslre ( 1.00 aim)Determine

Ic"- =208Jmol'K-j

(a) The change in lnternalenergy.

ibl ilc!,.'nranytfie cofstanimustelapselfan nltialychargedcapacjloristodlscharge5596 oi rts siored energy through a resistor ?

t6l

i6l

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6 A certaln para ei ireanl oi tighi cojts sis oi .adiei on oi v/avelengihs 45Onm and bTcnrnThe beam is incidenl normally on a ctifffaction grai ng which has 3bO lines per m limeler.Ceftain orders of diifraction of the 45Onm ight coinc de with certain other orders of the675n.. light.(a) Delermine the lowest non- zero order for eaah lvavelength for which lhis coincjdence

(b) At lvhat afg e of djfiraclion do these coincrdrng beams ernerge ?

i5l

7 Figore shows 3 cf the e ectfon c ene.gy evels of an elom What are the frequencies ofeleclromagnetic rad ation v/hich can rasult from trans t ons belween these levels?Siaie the region oi the ele.lromagnetrc spectrum n ,,!hrch the emitted radjai on ies.

Energy/ 10 r'!

J 9 68 _._-

21 78

af 4,2 -t6l

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.'^e.tion 9:tO!Zd,_*=40-nE9l-i!y i:tu_{.i'a!.!!$: in ihis 9eq[9,

T (a) i ) Define velcciiy.

lii) Ex:lain he!/ the displace:ieft and 1!? acce efaijc'i .f an J.l3ci rnay be foundirarn a velcc ry, t ane g.aah ci lis mot:a.

14)

I lh:; ,ra n h?, n-:st i50 C00 ki & : .iornrat operaiing spaed ci 50.nis. ji car be

/ co' srrer-.d to be :.-_:r=','.d . / a ccnst2ni ioice cf l8JkN and brakec 5.,, a constant foice of33CkN The train steds fiam ::si. Ca c]late iis ac.e ereito': ard the lime it takes io reach ils

141(c) The in\abltanis cl a cer(airi irwn rvou!l lke iralns io lrleke an a.ldi:lcial siop at their

stalion Th3 taln rroJh sta.C for i4o rrinrtas t! a o!,r p:ss:nJers io ggt on end off andi!i1:er delay wou d be caused c.,r havi1lg 1o slo!,/ acwn aaC speed ra.

(!r Sket.h spe3d iiii. graphs frr a: arr whi.5 i.3i sicp ai the ic'rrn aird fcr a train v,'hichices foi

iiii Calc!l:le ii.e to!:ri t.ii. Ceia)r ca!se4 5l rnak rg iie aCdli rn: sto!,

il, /]:i,,,.ou cl thitr d--l-:y t_rc ftClcec by 1.a.",.,: le"-r'ei c:' ages?

ii)

2 {a)A bcdr ri DVes at ccnaia^1 e.tulai ,,e ca i.,/ !,r ir a a rcle oi rad;Lrs r. State jts accelera|on

cperatine soeed

la ten",. aI r a"C r,i.

Frr tl,e ca.so- l_ a;ge :. caia! a:e tl-: ii3!r i:iai:s oi

Ill

(b) n a I C3 a: an erled3lnne:ll iark iwc ,:ecale, e3ch ri rnass SOkg s:t h ceEes whichiaave aI ccnsiarl s:reac in a veni:ai alial-: ai rajtus 3 art 2s sl'iov/t belc\,,,' Each ievol,jilontakesl2s ',r'iieracag?l:ai:rslJi!,i1.,:-:.:'.(pcsitic.rA):]-:pe.-:.r ir i s L:pslde dovr'..

A

it(ll{rii

I ie anE,.l:ar v3lcait.,'

- ae aenli,Deia :aaei::3,:c.

tll

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-

5

/cl l/) L/a'{, a !e.tor d.:oram jo snor! th

::;:";;lf"-":::,; ; ;;;; " il""l.,i; iljX?ii:'J,* :1i:Ji:il1'I"X'ii'di^:i"

,, (ii) D,u", tnu .o-ruspondrrg diagram tfcr the person at ihe botlorn oi ihe circle (pos/ijcn

i ilii. :', : j}:

:,;: :_i:. ;,,il;-.::; ;:";::, ;" :":" :;: :,.:", : :l',::"" li t"1",!' i"".iil il;l ;;,..1.-,o,.*, ".,-. on,,- e .on hrs,,s

L' _F -i- u d.,( ro€ntor, eouen i

?l;:ffj;' o''trveen rn, o spracemJ"i:iffiff:il?ilti,e

anpr,r,.,ce oi

"l;;ff#fillliX ,.:,:'::::::1",:;i:::"i,:::::; [11; l

o"",,n,u wi,l ]

plate

scillaiorFlgure 2

The plate oscj|ates vr'ith(i) Sketch a graph io

the plate.

a frequency of 13 Hzshow the va|ation !,,,jih cJisplacernejtl x of lhe acceleratjon a ol

tir)Th- acceler;tron a rs given b., thF

1".:i*''""'"r,, ;"";-:",;;:fi:,""" "''I tite anguler freqLencv urI lhE arnplrt!de of os. jtatton of t

a ,',r r 11 . .",,:":':':,: h'ra''r"oo 'n 'rd, e'er,ir'o, 's'. O or'.? ,"..-i r'

'!dio'oir 1l)l

ill ..", - "

:.":" , ' ' -- ,"i';:.:"1^" j;" ;,li;'" ,-,:..fJ,

nn'-r,.-,=5 ! prar-.r - |oscilator Figlie 3 i::-1- .--?/e gl-t

rr. ,r 'l ,e , o' or .t o. o. r 1 o,ar-- <!..ares are prodLr!ec cn in" ",""0

"'.,- 5 Jtcreasec &atceilainfrequencres. siaijonary( I Cof! F gure I E on your drairanr :ho,'.0.e c) 9r.ch,r"t r..0.r,"--"n.i

lh'-'r"io'"ry /d.eo^rrert ng //he Fer.a oaag 5o-r-

" r."":": {L

Iv^e: 15^p;e8I'eo-,e, -o1e-,oonosro2I UJ .o- odq:.r'":.Jrnepo,,onoll

, e.e:,, -.pa; ,,r,",,.,..;, ".,a r€

-od-o 'n..l Jo

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,ilai Describe bv nreans ca a dlaEram & a simp e equation the force due ic(l) an e ectric field,(li) a rnagnetic field

aeliig on an electron rnoving at nght angles to each fieid.

Hence explain how an ele.tric fi3 d & a magnetic field may be used in the selection oF thevei3aiiy cl iregaiiveli .hargecl parlic es I9l

(b) lcns havrnE cherge + Q & nrass N4 are 2ccelefaied frorn rest ihrolgh a potentialcjifJerencs V. lhe\' then move inio a region of space where theie is a Lrn f.rm magnetic fie doffiux derisity B aaling al right angles to lhe clireation oftravelofthe ions as shown in Flg.below.

Henceierivean expresslon inleimsoiN/ Q Bandv lor lhe ra.ils oi ihe palh ofi the magnetic iie C

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R.! on oi un iorn inagfetic fe C d rected jnio

plane oi paper

(i) Show that v the speed with ,,,/hich the ons enter ihe r.agnetic fle:ij. is given by! = \it2ov)rt,4l t3l

(rl

5 r ' -'-' pol.-t 1l o i' '6r o a d 'L]o .

Lbr A baiiery of enri 300t' arC fierna .es st2rce C5CQ is connect.C t.resisiance 6 36 a Derefrn ne

(i) the cLrrrent i. the clrcuii(ii) the potent ai d ference a.ross ire ! 36 O resisinr,(i i t.e !o',,,rr srcpl:C lo rfe 8 35 | res sici

i21

a resistor of

l6l

(c) =xplain

v/h:r' iire poierrilal dlf:eren.e ac.os3 the ierr.inals oi a baiiery ls

the baiteiy's ernf Urder \vlrai .rncit on is the poiertlal diiierence across

equa io ils e m.J ?

(d) Skelch graphs r/ith labeled axes ic sho\.? ho, the curreni through the \,vlre

potentia dilfeien.e across it ii th-. i3nlpe€1!re o: the lvrre

( ) is kept constani.( I increases as the curieni ncieases

nornraliy lower thana b3itery's tern inals

t3lvlil vary wlh the

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6 la) Describe the phcioelectric effect{b)The graph dravr'n in figure sho,rs hov/

from a padicular rnateral varjes y/iih thecauses the ernisslon oi photoe eclrons

plthe maxim!m kinet c energy E. of a photoelectronirequency f of the electromagnetic radiation that

4

?o

u-l

4 B

il110l+

o

12 14

Hz

16 18 20

(r) Use lhe graph to determi:re

1 the ihreshold f.equency for ihis r,raterral,2 the maximum kinetla €neroy cf pirotoe ectrons fron this rnaieria \yhen ii s jllurntnaied

r!'ith electrornagnetic radiaiton oflreqt?fcy jg 0 x 10,r llu Give youi anslvei in jou es

isl()Usethepho:oeleaticeq_raiion&vc!rirrrsrl,e.sfronr iodete.r.ineinepanikco.start

t.1lic) Electronagn-.trc waves hevca\tave natureaswe as a part culate natL_'e Thls is kno,,,/nas waveroartlcle iLta iiy Describeasi-raloninwhahpadicescanbesho,xntoheved\/avenaiure

Al The Besi

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