Spm 4531 2006 Physics p3 Berjawapan

8/2/2019 Spm 4531 2006 Physics p3 Berjawapan

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Paper 2 &il mflz fime: t hour and 30 minutesSection A[28 marks]

Answer all questions.The time suggestedo snswer this section s 60 minutes.

f A students carries out an experimentto investigate he relationship between he length of aircolumn, l, and the temperature, 0, for a fixed massof air. The airls trapped by conientratedsulphuric acid in a capillary tube.Diagram 1.1 showsthe thermometer and capillary tube tied on a metre rule.The sealedend of the capillary tube is placedat the zero mark on the scaleof the mler.Metre rule

illary tubeThermometer

Concentrated sulphuric acid

Trapped air column

Diagram 1.1thermometer and capillary tube are placed into a beaker frlled with water.arrangement of the apparatus is shown in Diagram 1.2.

ThermometerCapillary tube

Metre rule

BeakerConcentrated sulphuric acidWater

Diagram 1.2

SPM 2006 PHYSICS P3


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cubes are put into the beaker until the temperature, fl reaches 0 oC. The actual readinglength of the air column, l, is shown in Diagram 1--4on page 265.the beaker is heated until the temperature, fl reaches 20 "C.actual corresponding reading of the length of the air column, l, is shown in Diagram 1.5page 265.

procedure of the heating process is repeated with temperatures,: 30 qC, 40 qC, 50 oC, 60 qC and 70 oC.actual corresponding readings of the lengths of the air column, l, are shown in Diagrams1.9 and 1.10 on page 265.

For the experiment described on page 261, identify:(il The manipulated variable

lI mark](ii) The responding variable

IL markT'-'(iii) The constant variable

IL marklDiagram 1.3 shows the meniscus of the concentrated sulphuric acid inside the capillarytube.

Concentrated sulphuric acid

Trapped air columnDiagretn 1.3

State the correct position of the eye while taking the reading of dhe ength of the aircolumn.

:+-

lL mark)


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Diagram 1.4Air column length reading at 0 aC

Diagram 1.6Air column length reading at B0 t

Diagram l.gAir column length reading at 50 qC

Concentratedsulphuric acid

Trapped air

Diagram 1.10

Diagram 1.8Air column length reading at 2O"C

Diagrarn 1.7Air column length reading at 40 oC

Diagram 1.9Air column length reading at 60 "C


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(ii) Basedon Diagra^',n, r.b, 1.6, l.g, r.g and 1.10 on nroa eAK )^z^rair columnl, u'J ;h";' ;;&?#'Ji:_t# gnpase 65, etermrnehe engthabulateyo,r" "urrlts for e *a"iYfing temperaturl,e . --e' *vvve rn the spacebelow.

tu)on the graph paper on page 26g, plota graph of / against g.Based on your gfaph, state the relationship betwee r and0.

15 marksl

[5 marks]d)

eadings of t.rnarkl

A student carries orrf q_ ^r_^_-: tl m.arklffifi:'ir:n:L'#ffiry.{,F:#ffiffi r?,ffi$i{r"#}:,i:(a) Basedon the gfaph in Diagram 2.1, determinethe value of v when J = 0.2 A.how on the graph, how you determinethe value of V&) ohm,s Law states hor *1,^-^r, tz marhslto he"';";"JLT#TJffiilfHl"ffi::::: acrossconductorsdirectryroporrionar._Basedon the statement below'determinethe rangeof the current that obeys he ohm,s Law.how on the graph how you determine the range of the current.

[2 marks]


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Graph of / against 0


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Graph of V against I

,

: : 1- / , , , i i ; l : 'I : : -t |.! :. : .: i : ; . . ;. : : : -1 1;, ' .i i: il j : ' ::: ii r ) .1 !-: : ' i - i r : ;: :- ; ii i ' :r .: i. i1 .' !". .: , ! ' i i : t ,: ; "1 ' :- li i j . j ji.,: :. .. : i- r. I ,r='l1',: :. i.. .! . ' l - . i r

?t i t ' - i "

l ; ; :i i : , 'r _ ' l_- i- ,1: : . i. j i- i; ; : li t" : t

l -1.- t ; 'I I t:/, ; i : :t ;11a" . .t :,-l :

L -i '- l' : - ' i irr. i 1..4.

' ' , ' : ' . ] j ia

i . . : i ..1. i . . ;

.t

'1-; "' ,I ' i -- :. i.....!....1i : ia' ' a-e - i .'i- r-j--: i.-i-i.

i i - i . i . : i i i ..i--1.-i--l i - i - : /T i- i i' i "i,ii'l '. -: i t - . :^l': :'.i 1": .

...i.-.j...;..

i i ' i li - i - i -r-: ' i - i ' i j ' i Ii""i-'ii::. :l ' i - t i- i.1 :. . t ' 1.'1: : !.''t ii; '* i r' l -: t l

.1...i.....i.... :" i ? ;- j";-i-:

r'-:i j- i' i .i . i . .i- i : ; ' . ; . .t-',

: i1j t- j--j'-:,-i :-. i , - l . r :''';':-1":'

.4.. .1.. .._ I

; - ' t ' rii :

'- i :' l- i : - :. . ; . .1 . ,, .!...1-::

j" i t - : ': - -1' ' ' ; -ltl : i) . . , , . . . ! - .1 . i - i, ,: " : ,1.: ; ; /i . . j . . .1.. . : . .-l i_ 'i_ li - i. --l-i-ta^i i i r:- + -i "i I ii /l - i - l : '

. i ' - i - : ,. i4.i : ' : '1

i . . . : . . . . t , . : /', : ; : fi | ' t ' ll. a .i - t.--'"."t.l. : l" il":-.i."i :,.1..i / / , t ' : ' t - i'a ' )- i ' l . i . l

.r i- f-l-:.'i-'i"!'t - '\'^1..i-.i.i-.i.}/-:.!,- -i- r :-r"'! - i- i': ': : -.j 1" '1.-- 1,. .i- i

- :-1- : 1

- t : - i it .1 -i -r-l-1 -i i"::1'1f

-: i' t*i* i' l'xlT''j.-l..t-..;

{ i i i . i li i . il - :"'a-1".t...i'i'.l

_...r:-t_1l.. .....;.i - i : t1i: : j

'i :' -::.i,....a.1.._:.-; I.a--a. l-

": . .- i ' i - i' i - ' ; ' j ' ' ! '

: : l l -!"1"r' j -a-:-i i i . t i r i : i l

;-'i--i-

ia 1-r ' : -- 'i ' ' i - i '

1. . . - ! . - . j - :jj-u-i"a l ; ? -jr -'lt 'i-t l- : Ii ^: . . ii t - r 4-ll - . . i . -i .: . . . . i . . i . . . . .1.. '...:...tr.....i....1.+-!--: .1. i" i . r ' . ia-j--i'.'i oi6il ' r : i ;-iO{i j l : {;,j r.i"',,:! $rl ., *F- : .- : . . i , - : . - u:#ri, j" " ist':^i-'r':""i . i : L,;...;. :..... :' i0. ,idi .- i..Ji- f ji . l

i- : , -i ': r i . -

i -- . . i . "i i ) t ': --: ' ! - -+";-+-i i - i - -. i- r : :- i' l " i t :" i - :

Diagram 2.1


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(c) The gradient of the graph represents resistance.State how resistancevaries with current.

ll markl(d) The electric powel I usedby the bulb is gtvenby the formula P = I2 m, where m is thegradient of the graph.(i) Calculate the gradient, m, when I = 0.2 A.

Show on the graph how you determine m.

[4 rnarksl

(ii) Calculate the value of P when the current I : 0.2 A.

p:\*

12marks)(e) State one precaution that should be taken to improve the results of this experiment.

IL mark]


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Section BlLZ marks)

Answer any on.e question from this section.The time suggestedto answer this section is 30 minutes.

3.1 shows two wooden tops. One of the tops is partly coated with tin. Both tops arethe same size and are rotated with the same velocity.Diagram 3.2 shows the top which is partly coated with tin able to spin longer.

Diagram 3.2Based on the above information and observation:(a) State one suitable inference.&) State one suitable hypothesis.

IL markTlL mark

(c) With the use of apparatus such as a hacksaw blade, plasticine and other apparatus, describean experiment framework to investigate the hypothesis stated in 3(b).In your deseription, state clearly the following:(i) Aim of the experiment.(ii) Variables in the experiment.(iiil List of apparatus and materials.(iv) Arrangement of the apparatus.(v) The procedure of the experiment which include the method of controlling the manipulatedvariable and the method of measuring the responding variable.(vi) The way you would tabulate the data.(vii) The way you would analyse the data.

Diagram 3,1

LlD marksl


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Diagram 4.1 and 4.2 show two taps releasing droplets of water into large containersThe number of droplets which fall per second in Diagram 4.1 is more compared to the numberof droplets in Diagram 4.2.The cross-section of the water waves formed from the droplets in the containers are shown inthe diagrams.

TapTap0O-Water droplets0

Diagram 4.1Based on the information and observation above:(a) State one suitable inference.(b) State one suitable hypothesis.

Diagram 4.2

O-Wuter dropletso wave

IL marklIL markT

(c) With the use of apparatus such asa ripple tank, a vibration motor with adjustablefrequencyand other app""Ltos, describe an experiment framework to investigate the hypothesisstated n 4(b).In your description, state clearly the following:(i) Aim of the experiment.(iil Variables in the experiment.(iii) List of apparatus and materials.(iv) Arrangement of the apparatus.(v) Theprocedureof the experiment which inelude he methodof controlling the manipulatrvariable and the method of measuring the respondingvariable. *.-(vi) The way you would tabulate the data.(vii) The way you would analyse the data. [L0 rnarks]


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aper 3(a) (il(ii)(iii)ft) (il

(ii)

TemperatureThe length of the column of air.The length of the column of concentratedsulphuric acid.The eye must be at a position level withthe top of the trapped air column.

(c) , ,' ucm

Temperatures0 (T) Length of aircolumn, J (cm)0 7.7

20 7.630 7.940 8.150 8.460 8.770 9.0


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tilfs.2

,.tnLA2.42.O1.6t .20.80.4

, :." r":iuvrlo lnmgruh lith O-ii,:u,diuli,mffi fu rir column should be takeninrm rffh@dhc meniscus of the air columnrilrmmd Xreft error.s 'T

I]: I IA0.00 0.04 0.08 0.12 0.t6 0.20 0.24(b) Ohm's law is obeyed rom.I : 0 to -I = 0.1 A.(c) Resistance increases with the increase incurrent.(d)( i ) m - 1'60.076 x 10

n'L = 2I.'l'(ii) p = (I)zmp = (0.2)2xZI.LP = 0.84(e) The zero error shouldbe correctedby turningthe zero error adjustment knob until thepointer reads exactly'O' on the ammeter.

B(a) The inertia of the top dependson its mass.(b) The top with the larger mass has a largerinertia (indicatedby its ability to spin longer)'(c) (il Airn of exPerirnent:To study the relationship between massof an object and its inertia.(iil Variables in the exPeriment:Manipulated:Mass of the plasticirre, ftl..Responding:Period of oscillation, ?'Constant:

Stiffness of the hacksaw blade and thedistanceof the plasticine from the clamp'(iii) List of apparatus and materials:A hacksaw blade, a G-clamP, astopwatch, plasticine balls of mass 20 g,

(iv) Arrangement of aPParatus:

G-ciampHacksaw

Plasticine

Procedure:One end of a hacksaw blade is clampedto the leg of a table with the aid of aG-clamp. A2O g plasticine ball is placedon the tree end ofthe haclcsaw lade.Thefreeend of the hacksawbladeis displacedhorizontally and released to oscillate it'The time for 20 oscillations is rneasuredusing a stopwatch. This step is repeated.The average period of oscillation is thencalculated (/ro).The period of oscillationis determined by using the relationT = tro.The procedure is repeatedusingplasticine balls of mass 40 g, 60 g, 80 gand 100 g. A graPh of T2 against m isplotted.(v) Tbbulation of data:

(vii) Analysis of the data:?2(s)

m{C)A graph of ?2 against m indicates thatthe period ofoscillation increasesas themass increases, i.e. an object with alarger mass has more inertia.(viii) Conclusion:An object with a larger mass hasmore inertia. This is whY the toPpartly coated with tin was able to

Mass ofplasticinem.(g)fime for 20oscillations, t2o(s)

Period ofoscillationTr, ;1ft s)Ta(s?ltr t2 Average

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$prn lonf{et ' . ' l 'hc hypothesis isrrrrPted.

, ;ff lr ravelength o{'a wir. 't ' tL'pt 'nds on theiln|{;rcncy.il fha" highcr the frr:qut.rrtv of'r, ' ibration, the+lxrter is the wavelengt h ol i lrt' wirvc {brmed.,,rrn i, Aim of experiment:

To study the relat ionship betweenvelocity of n wavc, it.s fi'cqucncy and itswavelength.(ii) Variabloa in the experiment:Manipulated:FreqnencyReepcndlng:WavelengthConstent:VeleicityList of apparntus and materials.Ripple tank, a vibrator motor witha{ustable frequency,a lamp, white pieceof paper, a wooden bar, a mechanicalstroboscopeand a circular clipper.Arrangement of nppa.ratus:

white piecepaper

Procedure:A ripple tank is frlled with water and setup as shown. The tank is levelled so thatthe depth of water in the tank is uniformto ensure that the velocity of the wave isconstant. The inner surface ofthe tankis lined with a sponry material to ensurethat no reflection of water waves occurfrom the edges.The lamp above he tankis switched on and a large piece of paper

(white) is placed below the tank. Thevibrator motor secured on the wooden barwith the circular clipper attached isswitched on to produce circular waterwaves. The pattern of the waves formedis observed on the white paper with thehelp of a mechanical stroboscope.Theprocedure is repeated with increasingfrequency. The pattern is sketched on apiece of paper and the wavelengthmeasured. A graph of wavelength againstfrequency is plotted.Tabulation of data:

(vii) Analysis of data:

f(Hz)It is evident from the graph that as thefrequeney increases the wavelengthdecreases provided the velocity rennainsconstant.Conclusioi:As the wavelength decreases, thefrequency increases. This is why the tapthat releases more droplets of water persecond in a large container is observedto produce shorter wavelength of waterwaves. Hypothesis is accepted.

(vi)

( i i )

( iv)

tv, l

Frequeney(Hzl Wavelength,I (cm) Veloeity(m *t )20 ),1 V40 h2 v60 1- v80 14 vt00 I- v

Spm 4531 2006 Physics p3 Berjawapan

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