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Transcript of Paper 2 Spm 2004
4531/2 SULIT
ANGKA GILIRAN :…...................................................................
NO. KAD PENGENALAN :…………………………………….. NAMA : ……………………………………………………….…
NO. MAKTAB : ………………. KELAS : …………
MAKTAB RENDAH SAINS MARA
PEPERIKSAAN PERCUBAAN SPM 2004
FIZIK
Kertas 2
Dua jam Tiga puluh minit
JANGAN BUKA KERTAS SOALAN INI
SEHINGGA DIBERITAHU 1. Tuliskan angka giliran, no. kad pengenalan,
nama, no. maktab dan kelas anda pada ruang yang disediakan.
2. Kertas soalan ini adalah dalam dwibahasa. 3. Soalan di halaman kiri adalah dalam
bahasa Melayu. Soalan di halaman kanan adalah dalam bahasa Inggeris
4. Calon dikehendaki membaca maklumat di
halaman 2 dan halaman 3.
Kod Pemeriksa
Bahagian Soalan Markah Penuh
Markah diperolehi
1 4
2 5
3 6
4 7
5 8
6 8
7 10
8 12
1 20
B 2 20
3 20
C 4 20
Jumlah
Kertas solan ini mengandungi 23 halaman bercetak
4531/2 ©2004 Hak Cipta Bahagian Pendidikan dan Latihan (Menengah) MARA SULIT
SULIT 4531/2 Fizik Kertas 2 September 2004 2 1/2 jam
4531/2
A
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INFORMATION TO CANDIDATES 1. This question paper consists of three sections: Section A, Section B and Section C.
2. Answer all questions in Section A. Write your answers for Section A in the spaces
provided in the question paper. 3. Answer one question from Section B and one question from Section C. Write your
answers for Section B and Section C on the line pages provided at the end of this question paper. Answer questions in Section B and Section C in detail. Answers should be clear and logical. Equations, diagrams, tables, graphs and other suitable methods can be used to explain your answer.
4. The diagrams in the questions provided are not drawn to scale unless stated. 5. The marks allocated for each question or sub-section of a question are shown in
brackets. 6. If you wish to cancel any answer, neatly cross out the answer. 7. A list of formulae is provided on page 4 and page 5. 8. You may use non-programmable scientific calculator. However, steps in calculation
must be shown. 9. The time suggested to complete Section A is 90 minutes, Section B is 30 minutes and
Section C is 30 minutes. 10. Attach all your answers together and hand them in at the end of the examination.
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The following information may be useful. The symbols have their usual meaning.
1. t
uva −=
2. asuv 222 +=
3. 2
21 atuts +=
4. Momentum = mv
5. maF =
6. Kinetic energy = 2
21 mv
7. Potential energy = mgh
8. Vm
=ρ
9. Pressure, AFP =
10. Pressure, ghP ρ=
11. Heat, θmcQ =
12. =TpV constant
13. 2mcE =
14. λfv =
15. Power, time
energyP =
16. vuf111
+=
17. Dax
=λ
18. rin
sinsin
=
19. depthapparent
depthrealn
=
20. ItQ =
21. IRV =
22. Power, IVP =
23. 210 −= msg
24. Atmospheric pressure at sea level = 1 x 10 5 Pa Lihat sebelah
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Section A
[60 marks]
Answer all questions in this section.
You are advised to spend 90 minutes for this section. 1 Figure 1 shows an instrument for measuring electric current when it is not connected
to any circuit.
FIGURE 1 (a) (i) Name the measuring instrument.
…………………………………………………………………………………. [1 mark]
(ii) What kind of error is shown by the instrument ? ………………………………………………………………………….……… [1 mark]
(iii) State how the actual value of of the current may be obtained using the above
instrument.
…………………………………………………………………………..……… [1 mark] (b) What is the sensitivity of the measuring instrument ? ...........................................................................................................................…......... [1 mark]
1 (a)(i)
1 (a)(ii)
1 (b)
For Examiner’s
Use
1 (a) (iii)
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2 Figure 2 shows an instrument for measuring atmospheric pressure .
FIGURE 2
(a) (i) Name the instrument.
............................................................................................……............. [1 mark]
(ii) Why is mercury use in the instrument ?
............................................................................................……............. [1 mark]
(b) Calculate the atmospheric pressure in N m -2 when the height of the mercury column in the glass tube is 0.76 m . [Mercury density = 1.36 x 104 kg m -3 ]
[2 marks]
2 (a)(i)
2 (a)(ii)
For Examiner’s
Use
2 (b)
Mercury
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(c ) Figure 3 shows the instrument being placed in a vacuum chamber .
Mark the level of the mercury column in Figure 3. Choose from P, Q, R or S.
FIGURE 3
[1 mark]
2(c)
For Examiner’s
Use
To vacuum pump
Vacuum chamber
P Q
R
S
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3 Figure 4 shows a Strontium - 90 nucleus , decaying to form nucleus Y , emitting a beta particle and releasing an amount of energy.
FIGURE 4
(a) What is a beta particle ? ...........................................................................................................................
[1 mark] (b) How many neutrons are there in each Strontium - 90 nucleus?
……..........................................................................………………………….
[1 mark]
(c) Complete the nuclear equation for the decay of Strontium -90.
[2 marks]
(c) After 56 years, 75 % of the mass of Strontium - 90 has decayed to form nucleus Y.
What is the half-life of the Strontium - 90 nucleus ?
[2 marks]
3 (a)
3 (b)
3 (c)
For Examiner’s
Use
3 (d)
90 Sr 38
Energy
Nucleus Y
Beta Particle
Strontium - 90
38 Sr
90
….Y + …… + Energy
…..
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4 Figure 5 shows the pattern of water waves moving towards a gap between two walls
at a water-theme park.
FIGURE 5 (a) Calculate the velocity of the water waves if the frequency is 5 Hz. [2 marks]
(b) In Figure 5, draw the pattern of water waves after passing through the gap.
[2 marks] (c ) Name the wave phenomenon involved. ............................................................................................................................. [1 mark ] (d) Explain how this phenomenon occurs.
……………………………………………………………………………..…… ………………………………………………………………………………….. ………………………………………………………………………………….. …………………………………………………………………………………. [2 marks]
For Examiner’s
Use
4 (a)
4 (b)
4 (c)
4 (d)
Water waves
Wall
0.8m
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5 Figure 6 and Figure 7 show a student standing on a weighing scale in two situations, in a lift at rest and ouside the lift.
FIGURE 6 FIGURE 7
(a) Compare the readings of the scales in Figure 6 and Figure 7.
....................................................................................................................……. [1 mark]
(b) (i) Label and name two forces acting on the student in Figure 6. ............................................................................................................…
[1 mark]
(ii) State the relationship between the forces in (b) (i). .................................................................................................................
[1 mark]
(c ) Name the concept involved.
…………………………………………………………………………………. [1 mark]
For Examiner’s
Use
5 (a)
5 (b)(i)
5 (b)(ii)
5 (c)
Lift at rest
Weighing scale
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Use
(d) (i) State the change in the scale’s reading in Figure 6 when the lift accelerates upwards.
…………………………………………………………………………. [1 mark]
(ii) Give the reason for your answer.
…………………………………………………………………………. [1 mark]
(e) Give an example for the effect of force.
…………………………………………………………………………………. [1 mark ]
5 (d)(i)
5 (d)(ii)
5 (e)
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11 6 Figure 8 and Figure 9 shows a Bourdon Gauge attached to a car tyre before and after a
long journey.
(a) State one difference observed on the readings of both Bourdon gauge. ..............................................................................................................................……………...
[1 mark]
(b) What is the physical quantity measured by the Bourdon gauge ?
............................................................................................................................. [1 mark]
FIGURE 8
FIGURE 8
0 … .20
0 … .20
For Examiner’s
Use
6 (a)
6 (b)
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Examiner’s Use
6 (c)
(c) State the factor which influences the physical quantity in (b).
..............................................................................................................................
[1 mark]
(d) (i) What is the relationship between the physical quantity in (b) and the factor in (c) ?
.................................................................................................................
[1 mark]
(ii) Name the physics law involved in (d) (i).
................................................................................................................. [1 mark]
(iii) State one physical quantity which is kept constant for the law mentioned in (d)(ii).
.................................................................................................................
[1 mark]
(e) Using the kinetic theory of matter, explain how the observation in both situations occur.
.............................................................................................................................
............................................................................................................................. …………………………………………………………………………………. ………………………………………………………………………………….
[2 marks]
6 (d)(i)
6 (d)(ii)
6 (d)(iii)
6 (e)
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7 FIGURE 10 shows a light ray incident to a glass block.
FIGURE 10
(a) Mark and label the angle of incidence made by the light ray with surface AB.
................................................................................................................…........ [1 mark]
(b) Calculate the critical angle for the glass block if its refractive index is 1.50 .
[2 marks]
(c ) What happens to the light ray after point P?
………………………………………………………………………………. .
…………………………………………………………………………………
…………………………………………………………………………………
………………………………………………………………………………… [2 marks]
For Examiner’s
Use
7 (a)
7 (b)
7 (c)
Light ray A B Glass block
45° P C D
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The shape of the glass block is not suitable for use as a ring ornament.
(d) Based on the physics concepts discussed in (b) and (c ), explain the reasons for this .
....................................................................................................................…… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………………………………………
[2 marks]
(e) (i) Suggest another shape for the glass block so that it sparkles.
................................................................................................................ ………………………………………………………………………… ………………………………………………………………………....
[2 marks]
(ii) State how the shape proposed in (e)(i) will produce more sparkle. ………………………………………………………………………… …………………………………………………………………………
[1 mark] (iii) Draw a diagram showing the modified shape for the glass block.
Trace a light ray through it to show how the sparkle is produced.
[2 marks]
For Examiner’s
Use
7 (d)
7 (e)(i)
7 (e)(ii)
7 (e)(iii)
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8 Figure 11 shows a model of an electrical energy transmission system set up in a
school laboratory. The total resistance of the transmission cables is 4 Ω and the current through the transmission cables is 2 A.
(a) Calculate the power loss in the transmission cable.
[2 marks]
(b) (i) Predict the brightness of the light bulb in the village when cables with a larger diameter are used.
………………………………………………………………………….
[1 mark]
(ii) Explain the reason for your answer in (b)(i).
…………………………………………………………………………. [1 mark]
For Examiner’s
Use
8 (a)
8 (b)(i)
8 (b)(ii)
Transmission cable
Transformer M Tranformer
Power plant Light bulb In village
Light bulb
FIGURE 11
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The brightness of the light bulb in the village is increased by using transformer M.
(c ) Name the type of the transformer M.
………………………………………………………………………………
[1 mark]
Coil Number of coils
P
Q
R
2400
120
240
(d) You are supplied with several coils which can be used for making transformer M. The coils P, Q and R are made of the same type of wire.
(i) State all the possible combinations which can be used for making
the device in (c ). .............................................................................................................. ..............................................................................................................
[2 marks]
(ii) Calculate the ratio of primary voltage to secondary voltage for every combination in (d) (i)
[3 marks]
(iii) State the best combination in (d) (ii) that will produce maximum brightness for the light bulb in the village. Give the reason for your choice.
……………………………………………………………………….. ..............................................................................................................
.............................................................................................................. ..............................................................................................................
[2 marks]
For Examiner’s
Use
8 (d)(i)
8 (d)(ii)
8 (c)
8 (d)(iii)
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Section B
[ 20 marks ]
Answer any one question from this section
1
Figure 12 and 13 show some ice cubes left to melt in a cup at room temperature for 10 minutes.
(a) What is meant by temperature? [ 1 mark] (b) Observe Figure 12 and Figure 13, and compare the states of matter and the
thermometer readings. Relate the change in state and the thermometer readings to come up with a conclusion of the physics concept involved.
[5 marks]
(c) When a few drops of ether is dropped on a student’s hand, his hand felt cool. Explain how this happenend.
[4 marks] (d)
The figure above shows a plastic container filled with ice. If it is left to stand at room temperature, the ice will melt fast. Using the appropriate physics concepts, explain the modifications to an ice container so that ice does not melt easily when the container is placed in room at room temperature.
[10 marks]
FIGURE 12 FIGURE 13 (After 10 minutes)
0
-10
0
-10
Plastic container Ice
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2 Figure 14 and Figure 15 are photographs of two circuits where an n-p-n transistor
and two light bulbs P and Q are connected to two sets of dry cells.
FIGURE 14
FIGURE 15
(a). (i) Draw the symbol for an n-p-n transistor [1 mark ]
(ii) Draw the circuit diagram for Figure 14 . [4 marks]
(b). Observe Figure 14 and Figure 15. Compare the current in the base circuit and the brightness of the light bulb.
Relate the current in the base circuit to the brightness of the light bulb, then deduce
the functions of the transistor that are related to the current in the collector circuit. [5 marks]
[ Lihat sebelah
Switch (connecting wire)
Q
Transistor
P
Switch (connecting wire)
Q
Transistor
P
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FIGURE 16
(c) Figure 16 shows an old iron made of brass. Before using it for ironing, the iron must be filled with coal embers.
Using the appropriate physics concepts, explain the steps or modifications which have to be done to the iron so that it : (i) uses electrical energy, has safety features and is easy to use. (ii) has a light indicator which goes off automatically once it is hot
enough.
[10 marks]
Brass iron
Coal Embers
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Section C
[ 20 marks ]
Answer any one question in this section 1
FIGURE 17 As a researcher, you are assigned to investigate the characteristics of metals that can
be used for making of brake discs as shown in Figure 17, in a car factory.
(a) (i) What does the term density mean? [1 mark]
(ii) Explain the factors that influence the density of a material. [4 marks]
(b) You are given four metals J, K, L and M to choose from. The table below
shows the characteristics of the four metals.
Metal Density
/kg m -3 Melting Point
/ 0C Strength Rate of
expansion J 10500 327 high moderate
K 7900 1515 moderate low
L 8470 3410 high low
M 8920 1083 moderate moderate
Based on the table above;
i. Explain the suitable characteristics of the metals which can be used for making of brake discs.
(ii) Select the most suitable metal for making brake discs and give your
reasons. [10 marks]
Brake fluid Brake lining Piston Brake Disc
Disc Brake System
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(c) A student suspects her gold bangle is an imitation. The mass of the bangle is
165 g. The density of gold is 19.3 g cm –3 .
(i) Suggest a method for determining the volume of the bangle. [2 marks ]
(ii) If the volume of the bangle is 13 cm 3 , calculate the density of the
bangle. Is the bangle made of pure gold? [Jewelry with gold content of at least 75% may be considered made of pure gold]
[3 marks ]
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2
FIGURE 18
Figure 18 shows the block diagram of a circuit for producing modulated waves in a simple radio transmitter.
(a) (i) What does the term modulation mean? [1 mark ] (ii) Draw the wave forms produced at (i), (ii) and (iii). [4 marks]
(d) The figure below shows a hill located between a radio station between a house.
The radio station transmits a radio wave with a frequency of 101 MHz and a velocity of 3 x 108 m s-1.
(i) Calculate the wave length of the radio waves. [2 marks]
(ii) Can the occupants in the house receive the radio broadcast? Explain. [2 marks]
(i) Suggest one way how the occupants in the house can improve the
radio reception. [1 mark]
High frequency oscillator
Aerial
Modulator (A.M.)
Microphone
(ii) (iii) (i)
Radio station Hill House
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(c ) A medical specialist would like to engineer a tool in physiotherapy to treat
ailments of joints and muscle tissues. The tool would utilize transverse waves. The frequency of oscillations of water molecules in human cellular tissues is 5 x 10 13 Hz. The table below shows the characteristics of four transverse waves. Assume all the waves have the same velocity in air.
Wave
Frequency range /Hz
Penetrating
ability
Ionising ability
Dispersion of energy to the surrounding
cells and tissues P 10 11 - 10 14 High High None
Q 10 14 - 10 15 Medium Medium Slight
R 10 11 - 10 14 High Low Slight
S 10 14 - 10 15 Medium Low None
Based on the table above;
(ii) Explain the suitable characteristics of the waves that can be used for the tool.
(iii) Decide the most suitable wave to be used with the tool and give your
reasons. [10 marks]
END OF QUESTION PAPER