FtztK (4531)

SKEMA PEMARKAHANKERTAS 11213

Jawapan Kertas I

No. Jawapan No. JawananI B 26. B2. D 27. CJ. A 28. C4. c 29. C5. c 30. D6. c 31. B7. A 32. B8. C 33. A9. B 34. A10. D 35. CI l . C 36. D12. C 37. B13. A 38. A14. A 39. C15. A 40. D16. D 41. D17. B 42. A18. A 43. Cr9. B 44. A20. D 45. A21. A 46. D22. C 47. B23. D 48. B24. B 49. D25. D 50. A

NO.SECTION AMARKING CRITERIA

MARKSUB TOTAL

1(a)

(b)

(c)

(d)

Ability to detect small changes

Mass

0.1

Zero error

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2(a)

(b)

(c)

(d)

Distance between two successive equivalent point on the wave

Longitudinal wave

Shows a correct substitution- 170 x 2.5

Answer with a correct unit

- 425.0 m st or Hzm

lncrease

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(d)

(e)

3(a)

(b)

(c)

Give any two answer correctly- Upright, literally inverted, same size

Answer with unit5+9=l4m

Answer with unit3+7: l0m

MOO,fl H2,A',1{

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a(a)

(b)

(c)

(d)

Liquid,ro gas

-heat is absorved by molecules- heat is used to overcome the forces of attraction between molecule

Give any two answers correctly-humidity-movement of air-Temperature of surrounding

Show a correct substitutionHeat loss,Q = m/: 0.08 X 2.4 X 106Correct answer with unit192000 J

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Max 2

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Max 7

s(a)(b)

6 (a)

Aerofoil lifted up

- air flow upper surface high- air flow lower surface low- difference in pressure result in net upward force

Bernoulli's principle

Any apparatusBunsen burner

NormalReaction

Normal Reaction = Weight * forceor R:mg + ma

F: R-WR:ma*mgR:60(3)+60(10)R= 180+600N

lncreases

The lift decelerates downwards with deceleration a-3ms-' ,the reaction force (R) is greater than the weight of the boy.or R>W

III

3

7(a)

(bxi)(ii)

e) i)

(c)ii)

d)

HighWhen the connecting wire touches B the transistor is switched off. No currentflow through the Rr resistor and a voltmeter V2 shows high.

ftnput Tou$"t Ilo-T'-:__ll-'-To-___l*All output must be comect

NOT GATE

N-

-,2:-l-tl

ffiffiffil0 l l l0 l l l t l l lffi

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1I1I 10

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(c)

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8(q)i

ll

lll

(b)

ll

ll

15 hoursShorter time taken

GammarayHigh penetrating

LiquidEasier to dissolved

4T+ = 4x28

=llZyears

t40- - ).f ,28;

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= 'x5.0x101532

= 1.56 x lOta

Geiger Muller TubeiSpark counter/Diffusion cloud Chamber/Gold leaf electroscope/Photographic detector

To detect leakage in underground pipe/Thickness control in paper and metal sheet production/Examine contamination in canned food/In medical treatmenVIn archaeology/In agriculture

I r1) '- t I

16 \2)

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t+I

(d) r)

ii)

Mass defect = (2.104012 + 3.016050) - (4.002603 + 1.0087)u:0.018759 u

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

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I t2

Section B:9 (a) (r) Buoyant force is the upward force resulting from an object being

whollv or partiallv immersed in a fluid.I I

(ii) Water level in Diaeram 9.1 is lower than in Diaeram 9.2 IVolume of water displaced in Diagram 9.1 is less than in Diagram9.2

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Mass of load in Diagram 9.1 is less than inDiasramg.2 IWhen mass of load increases, weight of cargo also increases. Thus,volume of water displaced increases and buoyant force increases.

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Buoyant force: weight of cargo andload llWeight of water displaced = weight of cargo and load

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(iii) Archimedes' principle IArchimedes' Principle states that when an object is wholly orpartially immersed in a fluid, the buoyance force is equal to theweight of water displaced

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(b) Put the hydrometer into the liquid to be measured.The denser the liquid is, the hydrometer will float higher. Thereadings of hydrometer is higher.

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On the scale of a hydrometer, the zero reading is on top.The reading increases as it go down the scale. llBigger values on thelower part of the scale.Thus, the denser the object is, the higher the hydrometer afloat and itgives a greater reading.

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Modifications ExplanationUse material of low densityto build the bodv of the ship

Lighter

Use fibre to build the bodv ofthe ship

Stronger ll can withstand therough sea as it travel far

Use more partition to storethe oil

To reduce the effect ofinertia

Aerodvnamic in shaoe To reduce air resistanceSlioperv bodv To reduce water resistanceIncrease the size To increase the volume I to

increase the capacitvUse diesel in the enqine Safe energy

o Any 5 correct modifications and explanation and otherrelated answer

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10 (a) (i) Waves are carriers of energy // A wave is a disturbance thattransfers energy between two points through vibrations in amedium, without transferring matter between the two points.

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(ii) (1) Both the wave sources are coherent. I

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(2) In Diagram 9.1, the positions where the students are standingare where con.structive interference occurs.

ln Diagram 9.2, the antinodal lines are where constructiveinterference occurs.// Diagrams as follows:

ConstnrctiYe Interferenc e

2e

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(3) In Diagram 9.1, the positions in between the students arewhere destructive interference occurs.

In Diagram 9.2, the nodal lines are where desffuctive interferenceoccurs. //Diagram as follows:

D estnrctive Interferenc e

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(4) Physics concept: Interference //The principle ofsuperposition

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(5) Interference is the superposition of two waves originatingfrom two coherent sources //

Principle of superposition states that when two waves movesimultaneously and coincide at a point, the sum of thedisplacements at that point is equal to the sum of the displacementsof the individual waves bv vector method.

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(b)

- - - - -

lIt\\

Label crest and troughLabel a correctlyLabel x correctlyLabel D correctly

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(c)No Modifications Explanation(i) Distance between two

stereo speakers- Near to one another

To reduce interference

(ii) The speakers must beplaced in front of themicrophones

To avoid humming /disturbance // To preventthe sound from speakersbeing amplified again bythe microphones

(i ii) Covers the walls with thickand soft curtains / alaverofsoft board

To reduce the echoes effect// Soft materials can reducereflection of sound waves

Use chairs with thickcushions

To reduce the echoes effect// Soft materials can reducereflection of sound waves

Covers the floor with thickcarpets

To reduce the echoes effect// Soft materials can reducereflection of sound waves

Covers the wall withuneven / rough surface

To reduce the echoes effect// So that the reflectedwaves are in variousdirections and finally beingabsorbed

Make sure all the smallopenings between doors /windows and the door /window frames are closedUD

To avoid difhaction ofsound waves // To avoidnoise from the outside

Positioning of the twospeakers and audienceis arranged in the way assuch that they form atriangle

To produce a clear soundstaging effect

* For (iii), candidates can state any 3 modificationswith correct explanation

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No 1l Section C Sub Totala(t) Concave lens I(ii) l . Rays diverged after passing through concave lens

Ravs then focused bv eve lens2. ,|

(iii) High refractive indexLens is thinner lliehter .,

5b(D l. microscope is made up of two powerful convex lenses.

2.T is chosen as the objective lens3.as T has the highest power4. S is chosen as eye lens5. power of T is hieher than S

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b(iD l. object must be placed between f o and 2fo2. At least two rays of light from object to form the first image3. Real , magnified and inverted first image4. First image at a distance of less than focal length of eye lens5. Conect rays of light for the formation of second image6. Final image is virtual , magnified and invertedT.Distance between two lenses > fo + frn

anv 5 points Max 5 5c (i) Focal length :100 / 5

:20 cmI

(ii) l l40+l lv:

v:20 cm

/10 I

I(iiD M: v/u

:20 /20 = |lI 5

20marks

No 12a(i) Has magnetic properties when current flow //lose magnetic property when

there is no current.I I

(i i) l. Number of turns of coil2. When number of turns of coil increases , strength of electromagnet

increases.3. Current4. When current increase . strength of electromamet also increases 4

(bxi) l.Soft iron core2. Soft iron core focussed the magnetic flux/ increase the strength of theelectromagnet

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I(i i) I

2aJ

Minimum voltage for relay: 160 mA x 20= 3.2Y

Terminal AB must be connected to 6 V

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(ii i) L current = 1000/ 2402. :4.167 A3. Most suitable connecting wires will be thick copper wires4. copper - low resistance5. thick - do not melt due to hieh current / low resistance

IIIII l0

(c) (i) Step down transformer I( i i ) LNo of turns of secondary : l2l 240 x2000

2. :100 turnsII

( i i i ) l. lnput power = 0.125 x240:30 W

2. Efficiency :241 30 x 100 %3. : 80 o/o

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20m

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PHYSICS PAPER 3 (4531/3)

SECTION ANO MARKING SCHEME MARK

SUB TOTALl.(a) (D

(ii)

(iii)

(b) (i)

(ii)

(iii)

- diameter of nichrome wke I ddtameter w6yar nilvom / d

- Resistance of nichrome wire / RRintanganwcryar nilrom / R

-Length of nichrome wire / CurrentPanjangwcryar nilvom / Arus

-Diagram 1.2: l.5Y-Diagram 1.3 : 0.9 V-Diagram 1.4 : 0.6 V-Diagram 1.5 : 0.4 V-Diagram 1.6:0.3 V!91!g: Any three readings correct, award I mark

d/mm R/O0.15 7.500.20 4.500.25 3.000.30 2.000.35 r .50

Note : Any three readings correct, award 1 mark- Values of d,l/t,1, V and R shown in the table- State the units of d,I/f , I, V and R correctly- The values of d,I/f ,1, V and R are consisient (value for lld2

must be 3 or 4 decimal places)- Nilai-nilai d,I/t, [ lz and R ditunjukpada jadual- Nyatakan unit 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

l/{ /mm-' UA V/V R/O

0.15 44.4444 0.2 1.50 7.500.20 25.0000 0.2 0.90 4.500.2s 16.0000 0.2 0.60 3.000.30 11.1111 0.2 0.40 2.000.35 8.t632 0.2 0.30 1.50

q

(Accept 3 decimal places ".#

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III

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(c)

(d)

Draw a complete graph of Ragainst I/tTick { based on the following aspects :

- A. Show R on Y-axis and, I/d on X-axis- B. State the units of the variables correctly- C. Both axes are marked with uniform scale- D. All five points are plotted correctly,

Note : Only three points plotted correctly, award {- E. Best straight line is drawn- F. Show the minimum size of graph at least

5x4(10cmx8cm)square( counted from the origin until the furthestpoint )

Lukis srqf R melawan I/f dengan lengkapTanda,,l berdasarkan aspek berilcut :

- A. Tunjuklcan R pada paksi Y danI/t padapaksi X

- B. Nyatakan unit semua pemboleh ubahdengan betul

- C. Skala graf lcedru-duapal<si adalahseragam

- D. Kesemua titik ditanda dengan betulNota : Hanya tiga titik ditanda dengan betul, tl diberi

- E. Garis lurus penyesuaian yong terbaik danlicin

- F. Saiz graf sekurang-larangnya5x4(I0cmxBcm)persegi( dikira dari titik asalan hingga titikterakhi)

Score

I- R is directly proportional to d2

- R berfuidar langsung a"ngon !

Number of { Score7

5-63-42I

5432I

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1|l

{'V.l

{',1

5

I5

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/0

Graph of .R agari4stl/ /Graf R metawhhttd

Rt o/

/

/

/u

/./ .

/

a /

/

/J

/

/.'/

./7

/

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/

/

/

0 'I l aI t 1 I 4 5 ( D Uf m-2

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NO MARKING SCHEME MARKSUB TOTAL

2a)

2b)

2 c).i)

2 c) ii)

2 c) iii)

2d)

Increase linearlymeningkat secara linear

/:700 - 10070 -10

:j9960

= 10.00 cm

Show a gradient triangle on graph paperNote: Show the minimum size of triangle at least 5 x 4 (l0cm x8cm)Menunjulrkan segi tiga lcecerunan di atas grafCorrect substitutionPenggantianyang betul

Correct answer with unit = 10.0 cmJawapan dengan unit yang betul : 10.0 cm

Show the method to determine the value of u+v byshowing the corresponding horizontal line with zv.menunjulrkan cerapan uv dengan membina garis yang sepadan.

u * v:70 cm

v:l!ll-44822

:57.91cm

- Show the correct substitution- Menggantiknn nilai dengan betul

-State the correct answer with unit 57 .9 I cm. i 0.1-Menyatakan jawapan dengan unit yang betul 57.91cm. + 0.1

P- l @ I0.1m l0cm

: lo m-r @ o.lcm-r @ +loD

-Corect substitution- P enggant ian yang betul

-Correct answer with unit-Jawupan dengan unit yang betul

- Position of eye must perpendicular to the metre rule scalewhen reading is taken to avoid parallax error.Kedudukan mata hendaklah selari dengan

,skala bucaan.- hnage produced has to be as sharp as possible.

Irnei vune dihasilkan meslilah laiam.

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2

2

2

2i ._ _l_ _ __ __ tryleJ ,vut!$

l.J-

w lcmz

Graph of uv against a * uGraf uv melawan u t v

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SECTION BNO. MARKING SCHEME MARK

3 (a) Inference : The acceleratiott/velocity of the trains is depends on its masswhen force is constant.Inferens : Pecutan/halaju' kereta api mainan adalah bersandar padajisimnya

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(b) Hypothesis : When the mass increases, the acceleration/velocity is decreasesHipotesis : Apabila jisim meningkat, pecutan akan berkurang

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(c) Variables : Manipulated : mass ofthe trolleyResponding : acceleration/velocity of the trolley

Pembokh ubah dimanipulasikan : iisim troliPemboleh ubah yang bercandar : pecutan/halaiu troli

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Constant Variable : force applied to the trolley, frictionless runawayPemboleh ubah yang dimtlarhan : daya yang dikenakan pda troli, dayageseran troli

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List of apparatus : trolleys, runaway, pulley, ticker timer, ticker tape,slotted weight, thread, power supply, metre rule and weighingscale.

Senarai alatan : troli, landasan, takal, janglca detik, pita detik, pemberat,bekalan kuasa dan penimbang, pembari.s.

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Arrangement of apparatus: Diagram I or 21) Diagram I

ticker,,tun?tlliI

lottedtable weight

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2) Diagram 2

Ticker tape-------.-.-/* -Rubber band

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

)t

cg{r.ol of Manipurated variabre : Measure the mass of one troiley on aweighing scale.Timhang jisim sebuah troli dengan menggunakanpenimbang.

Measurement of Respoholley is calculated from length of the ticker tape.Pecutan/halaju troli dihitung dengan mengukur panjang pita detik

Repeat: RepeatedffiUlang eksperimen dengan 2,3,4 dan 5 buih trolr

Tabulation of dataAcceleration (ms-2

Daa,. t-- t ---2t )

Sketch the graph of mass against acceleration

Inference, rh" *Inferens: Panjang gelombang adarah beriandar rrepada'heiaraman air

Hypothesis: fheHipotesh : Semahin dal am air, ie makin panj ang panj ang ge lomb ang

Aim -:

To investigate thwavelength.T4juan: Uwuk mengk4ji hubung kait kedataman air danpanjanggelombang.

Variables : Manipulated : depth of waterResponding : wavelength

Dimanipulosikan : kedalaman airBergerak balos : panjang gelombang

Constant VarialtPemboleh ubah dimatarkan : freiuensi gelombang

r5

@itank, metre rule, stroboscope, power supply,water.

Senarai alat radas : Tangki riak, pembaris meter, strobosknp, beknlan htasadan air

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Apparatus Arangement:

Ripple stroboscope

White paper

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@ Variable. Measured lcm of water depth. Switch

on the ripple tank and sketch the wavefront on the white paper in the aid of

stroboscope.Uhtr lredalaman air lcepada I cm. Hidupkan tangki riak dan lakarkan mukagelombang dengan bantuan stroboscope.

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Measurement of Responding Variable : The wavelenglh ts measufed Dy

using metre rule referring to the sketch.fa4ang gelombang diuhtr dengan pembaris meter berpanduftan laftqran'

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IRepeat : Repeated for the depth of water wlth zcm, Jcm' 4cm ano ) cm.rn)-- oLomvimon iononn kednlnman 2.3.4 dan Scm

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I.-+-----.

Tabulation of data

Analysis of data.Sketih the graph of wavelength against depth'

Lakorkan graf paniang gelombang melowan kedalaman

wavGlength/m

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

t_-- TOTAL t2

II i - -L---