Skema Fizik Spm Trial Perak 2009

FtztK(4531) SKEMAPEMARKAHAN KERTAS11213 Jawapan Kertas I No. I

2. J.

4. 5. 6. 7. 8. 9.

10. I l.

12. 13.

NO.

Jawapan

No.

B D A

26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40.

c c c

A C

B D C C A

14. 15. 16. 17. 18.

A A D

r9. 20. 21. 22. 23. 24. 25.

Jawanan B C C C

D B B A A

C

D B A C D

41.

D

A

42. 43.

A C

B

44.

D A C

45.

A A

B

D B D

46. 47. 48. 49.

D B

50.

A

SECTION A MARKING CRITERIA

1(a) Abilityto detectsmallchanges

B D

MARK SUB TOTAL I

(b)

Mass

I

(c)

0.1

I

(d)

Zeroerror

I

4

2(a)

equivalentpoint on the wave Distancebetweentwo successive

I

(b)

Longitudinalwave

I

(c)

Showsa correctsubstitution - 170 x 2.5

I

Answerwith a correctunit - 425.0m st (d) 3(a)

(b)

(c)

(d)

or Hzm

lncrease

I I

Give any two answercorrectly - Upright, literally inverted,samesize

I

Answer with unit 5+9 =l4 m

I

Answer with unit 3+7 :l 0m

I

MOO,flH2,A',1{

5

I

(e)

3

a(a) Liquid,rogas (b)

by molecules -heatis absorved molecule theforcesof attractionbetween - heatis usedto overcome

(c)

Give any two answerscorrectly -humidity -movementof air -Temperatureof surrounding

(d)

Showa correct substitution Heatloss,Q= m/ : 0.08X 2.4X 106 Correct answerwith unit J 192000

7

I I I

I I I Max 2

I I

Max 7

s(a) Aerofoilliftedup (b)

-

air flow uppersurfacehigh air flow lower surfacelow differencein pressureresultin net upward force

Bernoulli'sprinciple Any apparatus Bunsenburner 6 (a) Normal Reaction

NormalReaction= Weight * force R:mg + ma or F: R-W R:m a*mg R:60 (3)+60(10) R = 1 80+600N

lncreases a-3ms-' , downwardswith deceleration The lift decelerates the reactionforce (R) is greaterthan the weight of the boy. o r R>W

3

I I I

I

7(a)

(bxi) (ii)

e) i)

High Whenthe connectingwire touchesB the transistoris switchedoff. No current flow throughthe Rr resistoranda voltmeterV2 showshigh.

1 I

ftnputTou$"t I

lo-T'-:__l l-'-To-___l *All

I

NOT GATE

I

outputmustbe comect

(c) ii)

I

Ntl

-,2:-l-

1 I 1 I

ffi

d)

ffi ffi

l 0 ll l 0 ll l tl l l

10

ffi

8(q) 15hours i ll

lll

I I I I I I

Shortertime taken Gammaray High penetrating Liquid Easierto dissolved

(b) I

I r1)'

I

I

-t

16 \2)

4T+= 4x28 =llZyears ll

t40 28;

-

).f ,

I

I

= 'x5 .0x1015

32

= 1 . 5 6x l Ota (c) I

ll

GeigerMuller Tubei Sparkcounter/ DiffusioncloudChamber/ Gold leaf electroscope/ detector Photographic

I

To detectleakagein undergroundpipe/ Thicknesscontrolin paperandmetalsheetproduction/ Examinecontaminationin cannedfood/ In medicaltreatmenV In archaeology/ In agriculture

t+ I

I

(d) r) Massdefect= (2.104012+ 3.016050) + 1.0087)u - (4.002603 : 0 . 0 1 8 7 5 9u ii)

9

I

(1.66x tO-27111.0 Energyreleased:(0.018759) x 108;2J :2.80x l0-"

(a)

(r) (ii)

SectionB: Buoyantforce is the upward force resulting from an object being whollv or partiallv immersedin a fluid. Waterlevel in Diaeram9.1 is lower thanin Diaeram9.2 Volume of water displacedin Diagram9.1 is lessthan in Diagram 9.2 Massof loadin Diagram9.1 is lessthaninDiasramg.2

t2

I

I

I

I I I

When mass of load increases,weight of cargo also increases.Thus, I volume of water displaced increasesand buoyant force increases.

Buoyantforce: weightof cargoandloadll Weightof waterdisplaced= weightof cargoandload (iii)

(b)

I

t

Archimedes' principle

I Archimedes' Principle statesthat when an object is wholly or 1 partially immersedin a fluid, the buoyanceforce is equal to the weightof waterdisplaced Putthe hydrometerinto the liquid to be measured. t The denserthe liquid is, the hydrometerwill float higher. The readingsof hydrometeris higher. On the scaleof a hydrometer,the zeroreadingis on top. I Thereadingincreasesasit go downthe scale.llBigger valueson the lower part of the scale. Thus,the denserthe objectis, the higherthe hydrometerafloatandit givesa greaterreading.

2

2

10 Modifications Use material of low density to build the bodv of the ship Usefibre to build the bodv of the ship Use more partition to store the oil Aerodvnamicin shaoe Sliopervbodv Increasethe size

Explanation Lighter

Strongerll canwithstandthe roughseaasit travel far To reduce the effect of inertia To reduceair resistance To reducewaterresistance To increasethe volume I to increasethe capacitv Usedieselin the enqine Safeenergy o Any 5 correct modificationsand explanationand other related answer

10 (a)

(i)

(ii)

Waves are carriers of energy // A wave is a disturbancethat transfersenergybetweentwo points through vibrations in a medium,without transferringmatterbetweenthe two points. (1) Both the wave sourcesarecoherent.

I

I

(2) In Diagram9.1, the positionswherethe studentsare standing I are where con.structiveinterferenceoccurs. ln Diagram 9.2, the antinodal lines are where constructive interferenceoccurs.//Diagramsas follows: ConstnrctiYeInterference

2e

(3) In Diagram9.1, the positionsin betweenthe studentsare I wheredestructiveinterferenceoccurs. In Diagram 9.2, the nodal lines are where desffuctiveinterference occurs.//Diagram as follows: D estnrctiveInterference

(4) Physicsconcept:Interference//The principleof superposition

I

(5) Interferenceis the superpositionof two wavesoriginating 1 sources // from two coherent Principle of superposition states that when two waves move simultaneously and coincide at a point, the sum of the displacementsat that point is equal to the sum of the displacements of the individualwavesbv vectormethod.

6

5

(b) l

I t

\ \ -----

I I I I

Labelcrestand trough Labela correctly Labelx correctly LabelD correctly (c)

No

(i) (ii)

Modifications Distancebetweentwo stereospeakers - Nearto one another The speakersmust be placedin front of the microphones

4

Explanation To reduceinterference

To avoidhumming/ disturbance// To prevent the soundfrom speakers beingamplified againby the microphones (i ii) Coversthe wallswith thick To reducethe echoeseffect and soft curtains/ alaver // Soft materialscan reduce ofsoft board reflectionof soundwaves Usechairswith thick To reducethe echoeseffect cushions // Soft materialscanreduce reflectionof soundwaves Coversthe floor with thick To reducethe echoeseffect carpets // Soft materialscanreduce reflectionof soundwaves Coversthe wall with To reducethe echoeseffect uneven/ roughsurface // So that the reflected wavesare in various directionsand finally being absorbed Make sureall the small To avoid difhaction of openingsbetweendoors/ soundwaves// To avoid windowsand the door / noisefrom the outside window framesare closed

2 2

UD

Positioningof the two To producea clearsound speakersand audience stagingeffect is arrangedin the way as suchthat they form a triangle * For (iii), candidatescan state any 3 modifications with correct explanation

6

l0

SectionC

No 1l a(t)

(ii) (iii)

b(D

b(iD

c (i)

(ii)

(iiD

Concavelens l. Raysdivergedafter passingthroughconcavelens 2 . Ravsthen focusedbv eve lens High refractiveindex Lens is thinner lliehter l. microscopeis madeup of two powerful convexlenses. 2.T is chosenas the objectivelens 3.asT hasthe highestpower 4. S is chosenaseyelens 5. powerof T is hieherthan S l. objectmust be placedbetweenf o and 2fo 2. At leasttwo raysof light from objectto form the first image 3. Real , magnifiedand inverted first image 4. First imageat a distanceof lessthan focal lengthof eye lens 5. Conect rays of light for the formationof secondimage 6. Final imageis virtual , magnifiedand inverted T.Distancebetweentwo lenses> fo + frn anv 5 points :100 /5 Focallength :20 cm ll4 0 +llv: /1 0 v:20 c m M : v/u :20 /20= |

Sub I

Total

,| .,

I I I I I

Max 5 I

5

5

5

I I l I

5

20 marks No 12 a(i)

(ii)

(bxi) (ii)

Has magneticpropertieswhen currentflow //lose magneticpropertywhen thereis no current. l. Numberof turnsof coil 2. Whennumberof turnsof coil increases, strengthof electromagnet increases. 3. Current 4. Whencurrentincrease. strengthof electromametalso increases l.Soft iron core 2. Soft iron core focussedthe magneticflux/ increasethe strengthof the electromagnet I Minimumvoltagefor relay: 160mA x 20

2 a J

(iii)

(c) (i) (i i ) (i i i )

= 3 .2Y to 6 V TerminalAB mustbeconnected

L current= 1000/240 :4.167 A 2. 3. Most suitableconnectingwires will be thick copperwires 4. copper- low resistance 5. thick - do not melt dueto hieh current/ low resistance Stepdown transformer : l2l 240 x2000 LNo of turnsof secondary :100 turns 2. = l. lnputpower 0.125x240 :30 W 2. Efficiency:241 30 x 100% : 80 o/o 3.

I

I

I

4 I I I I l I I I I I I I I I I I

l0

Mar 5 20m

PHYSICS PAPER 3 (4531/3) SECTION A MARKING SCHEME

NO

l.(a)(D - diameterof nichromewke I d

MARK SUB TOTAL I

I

dtameterw6yar nilvom / d

7

(ii)

- Resistanceof nichromewire / R Rintanganwcryar nilrom / R

I

I

(iii)

-Lengthof nichromewire / Current Panjangwcryarnilvom / Arus

I

I

2

2

2

2

I I I

I I I

(b) (i)

\ )

(ii)

1.2: l.5Y -Diagram -Diagram1.3: 0.9V -Diagram1.4: 0.6 V -Diagram1.5: 0.4 V 1.6:0.3V -Diagram !91!g: Any three readingscorrect, award I mark d /mm 0 .1 5

0.20 0.25 0.30 0.35 (iii)

I

I

)

R/O 7.50 4.50

3.00 2.00

r.50

Note : Any three readingscorrect, award 1 mark - Valuesof d,l/t,1, V and R shownin the table - Statethe units of d,I/f , I, V and R correctly - The valuesof d,I/f ,1, V and R are consisient(value for lld2 must be 3 or 4 decimalplaces) Nilai-nilai d,I/t, [ lz and R ditunjukpada jadual - Nyatakanunit d,I/f ,1, V and R dengin beiut - Nilai-nitai d,l/f, I, V and^R mempunyai tempatperpuluhan yang tekal (untuk nitai I/f perlu 3 ataa a dtik-perputuhan) d/ mm

0.15 0.20

l/{ /mm-'

44.4444 25.0000 0.2s 16.0000 0.30 11.1111 0.35 8.t632

UA 0.2 0.2 0.2 0.2 0.2

V/V

R/O

1.50

7.50 4.50

0.90 0.60 0.40 0.30

3.00 2.00 1.50

(Accept3 decimalplaces ".#

q

(c)

Draw a completegraph of RagainstI/t Tick { basedon the following aspects: - A. ShowR on Y-axis and,I/d on X-axis - B. Statethe units of the variablescorrectly - C. Both axesaremarkedwith uniform scale - D. All five pointsareplottedcorrectly, Note : Only threepointsplottedcorrectly,award{ - E. Best straightline is drawn - F. Showthe minimum sizeof graphat least 5x4(10cmx8cm)squ a re ( countedfrom the origin until the furthest point )

{

I

I 1|l

{

'V.l {

',1

Lukis srqf R melawan I/f denganlengkap Tanda,,l berdasarkanaspekberilcut: - A. TunjuklcanR pada paksi Y dan I/t padapaksi X - B. Nyatakan unit semuapemboleh ubah denganbetul - C. Skalagraf lcedru-duapal<siadalah seragam - D. Kesemuatitik ditanda denganbetul Nota : Hanya tiga titik ditanda denganbetul, tl diberi - E. Garis lurus penyesuaianyong terbaik dan licin - F. Saizgraf sekurang-larangnya 5x4(I0cmxB cm)pers e g i ( dikira dari titik asalan hingga titik terakhi) Score Number of { Score

7 5-6 3-4 2 I (d)

- R is directly proportionalto

5 4 3 2 I I d2

5

5 - R berfuidarlangsunga"ngon

I

!

I

/0

Graph of .Ragari4stl// Graf R metawhhttd

Rt

o / / / / u

/. /.

/ /

a

/ / J

/ /

.' /

./

7 /

J / / /

0

'I

l

a

I

t

1 I

4

\\

5

(

D

Uf

m-2

MARK

MARKING SCHEME

NO

SUB TOTAL 2a) 2b)

I

Increaselinearly meningkatsecaralinear

I

/:700 - 100 70 -10

:j99

60 = 10.00cm Show a gradienttriangle on graphpaper Note: Show the minimum size of triangle at least5 x 4 (l0cm x 8cm) Menunjulrkansegi tiga lcecerunandi atas graf Correctsubstitution Penggantianyangbetul

I

I

Correctanswerwith unit = 10.0cm Jawapandenganunit yang betul : 10.0cm

I

Showthe methodto determinethe valueof u+v by showingthe correspondinghorizontalline with zv. menunjulrkan cerapanuv denganmembinagarisyang sepadan.

I

3

2 c).i)

u * v:70 cm I

2

2 c) ii) v:l!ll-4482 2 :57.91cm - Showthe correctsubstitution - Menggantiknnnilai denganbetul

I

-Statethe correctanswerwith unit 57.9I cm.i 0.1 jawapan denganunit yang betul 57.91cm.+ 0.1 -Menyatakan

I

2

2 c) iii) I l @ l0cm 0.1m : lo m-r @ o.lcm-r @ +loD

P-

-Corect substitution -Penggantian yang betul

I

-Correctanswerwith unit -Jawupandenganunit yang betul

I

2

2d) to the metrerule scale Positionof eyemustperpendicular whenreadingis takento avoidparallaxerror. Kedudukanmata hendaklahselari dengan ,skalabucaan. - hnageproducedhasto be as sharpas possible. Irnei,vut!$ vune dihasilkan meslilah laiam. _l______tryleJ -

i

._

l.J-

I

I

2

Graph of uv against a * u Graf uv melawan u t v w lcm z

\3

SECTIONB NO. 3

(a)

MARKING SCHEME of the trains is dependson its mass The acceleratiott/velocity : Inference when force is constant. Inferens : Pecutan/halaju'kereta api mainan adalah bersandarpada jisimnya

(b)

is decreases the acceleration/velocity Hypothesis: Whenthe massincreases, Hipotesis : Apabila jisim meningkat,pecutan akan berkurang

(c)

Variables : Manipulated : massofthe trolley of the trolley Responding : acceleration/velocity Pembokh ubah dimanipulasikan : iisim troli Pemboleh ubahyang bercandar : pecutan/halaiu troli Constant Variable : force appliedto the trolley, frictionlessrunaway Pemboleh ubahyang dimtlarhan : dayayang dikenakanpda troli, daya geserantroli

MARK I

I

I

I

List of apparatus : trolleys,runaway,pulley, ticker timer, ticker tape, slottedweight,thread,power supply,metrerule andweighing scale. Senarai alatan : troli, landasan,takal,janglca detik,pita detik,pemberat, bekalankuasadanpenimbang,pembari.s.

I

Arrangementof apparatus:Diagram I or 2 1) Diagram I

I

ticker ,,tun?tlliI

lotted weight

table 2) Diagram 2

Ticker tape-------.-.-/*

-Rubber

band

. -,u- .{-; j:--i=- ------- frouey -.,' '---t'tltl)ft'{i?f

)t

cg{r.ol of Manipuratedvariabre : Measurethemassof one troileyon a weighingscale. jisim sebuahtroli denganmenggunakanpenimbang. Timhang Measurement of Respo holley is calculatedfrom lengthof the ticker tape. Pecutan/halajutroli dihitung denganmengukurpanjang pita detik

Repeat: Repeatedffi Ulangeksperimen dengan2,3,4dan5 buih trolr Tabulation of data Acceleration (ms-2 Daa,.t--

t---2t

)

Sketchthe graphof massagainstacceleration

Inference, rh" * Inferens: Panjang gelombangadarahberiandar rrepada'heiaraman air Hypothesis:fhe Hipotesh : Semahindalam air, ie makinpanj angpanj ang gelombang Aim To investigateth -: wavelength. T4juan: Uwuk mengk4ji hubungkait kedatamanair danpanjang gelombang. Variables : Manipulated : depthof water Responding : wavelength Dimanipulosikan : kedalamanair Bergerak balos : panjang gelombang Constant Varialt Pembolehubah dimatarkan : freiuensi gelombang

r5

powersupply, metrerule, stroboscope, water. Senarai alat radas : Tangki riak, pembaris meter,strobosknp,beknlanhtasa dan air

I

ApparatusArangement:

I

@itank,

stroboscope

Ripple

White paper Variable. Measuredlcm of water depth.Switch @ the wavefronton thewhite paperin the aid of sketch and tank on the ripple stroboscope. Uhtr lredalamanair lcepadaI cm. Hidupkan tangki riak dan lakarkan muka gelombangdenganbantuanstroboscope.

I

Measurement of RespondingVariable : The wavelenglhts measufedDy usingmetrerule referringto the sketch. fa4ang gelombangdiuhtr denganpembaris meterberpanduftan laftqran'

I

Repeat : Repeatedfor the depthof waterwlth zcm, Jcm' 4cm ano ) cm.

I

rn)--

oLomvimon

iononn

kednlnman

2.3.4 dan Scm

I

Tabulation of data

Analysisof data. Sketihthe graphof wavelengthagainstdepth' Lakorkan graf paniang gelombangmelowankedalaman

I

wavGlength/m

I

I

l-.-_----.--* depth/m

I !

i

i I i I

I

i I I

I i i

I I

I I

I

I .-+-----.

I

i-

t _ --

TOTAL

-L- - -

I

t2