JPT-Physics P1 Setara-Trial SPM 2007

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    LATIHAN SETARA

    [See overleafCONFIDENTIAL

    4531/1

    1

    JABATAN PENDIDIKAN TEKNIKAL

    KEMENTERIAN PELAJARAN MALAYSIA

    LATIHAN SETARA SPM 2007

    PHYSICS

    Paper 1

    One hour and fifteen minutes

    JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

    1. Kertas soalan ini adalah dalam dwibahasa. .

    2. Soalan adalah dalam Bahasa Inggeris d an diikuti dengan Bahasa Melayu yang sepadan.

    __________________________________________________ _______________________

    This question paper consists of 23 printed pages.

    4531/1Physics

    Paper 12007

    14

    1 hour

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    INFORMATION FOR CANDIDATES

    [MAKLUMAT UNTUK CALON]

    1. This question paper consists of 50 questions.

    [Kertas soalan ini mengandungi50soalan]

    2. Answerall questions.[Jawab semua soalan].

    3. Answer each question by blackening the correct space on the answer sheet.[Jawab setiap soalan dengan menghitamkan ruangan yang betul pada kertas jawapan.]

    4. Blacken only one space for each question.[Hitamkan saturuangan sahaja bagi setiap soalan].

    5. If you wish to change your answer, erase the blackened mark that you have made.Then blacken the space for the new answer.[Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat. Kemudianhitamkan jawapan yang baru.]

    6. The diagrams in the questions provided are not drawn to scale unless stated.[Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan.]

    7. You may use a non-programmable scientific calculator .[Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.]

    8. A list of formulae is provided on page 3[Satu senarai rumus disediakan di halaman 3]

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    The following information may be useful. The symbols have their usual meaning.

    Maklumat yang berikut mungkin berfaedah. Simbol-simbol mempunyai makna yang biasa.

    1.t

    uva

    !

    2. v2

    = u2

    + 2as

    3. s = ut +2

    21 at

    4. Momentum = mv

    5. F = ma

    6. Kinetic Energy =2

    1mv2

    7. Potential energy = mgh

    8. Elastic potential energy = Fx2

    1

    9. V =V

    m

    10. Pressure [Tekanan],p = hVg

    11 Pressure[Tekanan] ,p = A

    12. Heat [Haba], Q = mcU

    13. !T

    PVconstant

    14. E= mc2

    15. v = fP

    16. Power P =Time

    nergy

    [Kuasa] P =

    17. vuf

    111!

    18. P =D

    ax

    19. n =ri

    sinsin

    20. n =

    21. Q = It

    22. V= IR

    23. Power[Kuasa],P = IV

    24.

    25. Efficiency = %100vpp

    ss

    VI

    VI

    26. g= 9.8 m s-2

    Real depth

    Apparent depth

    p

    s

    p

    s

    V

    V

    N

    N!

    [Tenaga Kinetik]

    [Tenaga Keupayaan]

    [Tenaga keupayaan kenyal]

    [Kecekapan]

    [Dalam nyata]

    [Dalam ketara]

    [Tenaga][Masa]

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    Each question is followed by either three, four or five options. Choose the bestoption for each question then blacken the correct space on the answer sheet.

    Setiap soalan diikuti oleh sama ada tiga, empat atau lima pilihan jawapan. Pilihsatu jawapan yang terbaik bagi setiap soalan dan hitamkan ruangan yang betulpada kertas jawapan anda.

    1. Which of the following is a unit for a base quantity?Manakah antara yang berikut adalah unit bagi kuantiti asas?

    A.Joule

    B. Minute

    C.Newton

    D.Ampere

    2. Diagram 1 shows a map for a treasure hunt competition. The contestants have to cycleto reach the finishing station.Gambar rajah 2.1 menunjukkan peta pertandingan mencari harta karun. Peserta berbasikaluntuk sampai ke stesen penamat.

    Start

    Mula

    Finish

    Tamat

    Station R

    Stesen R

    Station Q

    Stesen Q

    Station P

    Stesen P

    25 km

    8 km

    20 km

    4 kmN

    DIAGRAM 1

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    Calculate the total distance and total displacement traveled by the contestants?Kira jumlah jarak dan jumlah sesaran yang telah dilalui oleh peserta itu?

    Distance DisplacementJarak Sesaran

    A 57 km N 670

    E 13 km

    B 57 km 13 km N 670 E

    C 57 km N 670

    E 57 km

    D 57 km 57 km N 670

    E

    3. You are given an equation of qX

    aP ! . Which of the following quantities need to

    be plotted in order to determine the value of a?

    Anda diberi dengan persamaan q

    aP ! Manakah antara kuantiti yang berikut perlu di

    plot untuk mendapatkan nilai a?

    A.

    B.

    C.

    X

    P

    q

    P

    x

    1

    P

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    4. Which measuring tool is the most sensitive?Manakah alat pengukuran tersebut yang paling peka?

    A

    B

    C

    5. A car starts from rest and goes down a slope with a constant acceleration of 5 ms-2

    . After

    5 s the car reaches the bottom of the hill. Its speed at the bottom of the hill, in meters per

    second, is:Sebuah kereta bergerak dari keadaan rehat dan menuruni sebuah bukit dengan pecutan sekata5 ms-2 dan tiba di bawah bukit selepas 5s. Laju kereta itu di bawah bukit dalam meter per saat

    ialah

    A. 1

    B. 12.5

    C. 25

    D. 50E. 160

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    6. The graph shows how the speed of a car changes with time.Graf menunjukkan bagaimana laju sebuah kereta berubah dengan masa.

    Which of the following gives the distance travelled in time interval OR?Manakah di antara berikut menghasilkankan jarak yang dilalui dalam sela masa OR?

    A the area OPQR

    B the length PQ

    C the length (QR PO)

    D the ratio QR/PO

    7. A heavy lorry has a high inertia. How difficult is it to start the lorry moving and tostop it moving ?

    Sebuah lori yang berat mempunyai inersia yang besar. Berapa sukarkah untuk mula

    menggerakkan lori dan untuk memberhentikanya.

    to startuntuk mengerak

    to stop

    untuk berhenti

    A

    B

    CD

    y difficult

    y difficult

    y easy

    y easy

    y difficult

    y easy

    y difficult

    y easy

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    8 Diagram 2 below shows 5 steel balls of the same mass: A, B, C, D, and E .Rajah 2 di bawah menunjukkan 5 bebola keluliA, B, C, dan Eyang mempunyai jisim

    yang sama.

    What will happen if ball A is pulled aside and let go with a velocity of v?Apakah yang akan berlaku bila bebola A ditarik ke kiri dan dilepaskan dengan halaju v?

    A. Velocity of ball A decreases while the velocity of ball E increases.

    Halaju bebola A berkurang manakala halaju bebola Ebertambah.

    B. Balls B, C, D and E moves with the same velocity, v.Bebola B, C, D dan Ebergerak dengan halaju yang sama, v.

    C. Ball A becomes stationary while ball E moves with the same velocity, v.Bebola A menjadi pegun manakala bebola Ebergerak dengan halaju yang sama, v.

    D.All balls move with the same velocity, v.Semua bebola bergerak dengan halaju yang sama, v.

    9. Which property of a body cannotbe changed if a force is applied to it?Apakah ciri-ciri suatu jasad yang tidak boleh diubah jika suatu daya dikenakan ke atasnya?

    A its mass (jisimnya)

    B its shape (bentuknya)

    C its size (saiznya)

    D its velocity (halajunya)

    AB C D E

    DIAGRAM 2

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    10. Nizar kicks a ball of mass 1.2 kg with a force of 15N and the time of impact between hisboots and the ball is 0.2 s. Calculate the maximum velocity achieved by the ball.Nizar menendang sebiji bola berjisim 1.2 kg dengan daya 15Ndan masa pelanggaran di

    antara but dan bola ialah 0.2 s.Kirakan halaju maksimum yang dicapai oleh bola.

    A 2.5 ms-1

    B 15 ms-1C 25 ms

    -1

    D 30 ms-1

    E 90 ms-1

    11 A coconut falls from a tree of height 2.3 m. Which of the following quantities remains

    unchanged?Sebiji kelapa terjatuh dari pokok setinggi 2.3m. Antara kuantiti berikut yang mana tidak

    berubah?

    A The potential energy of the coconut.

    Tenaga keupayaan graviti kelapa.

    B The velocity of the coconut.

    Halaju kelapa.

    C The acceleration of the coconut

    Pecutan kelapa.

    D The displacement of the coconut.

    Sesaran kelapa.

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    12 Diagram 3 shows a weight, W supported by two strings. Which vector diagram representsthe forces T1, T2 and W that acts on the weight?Rajah 3 menunjukkan sebuah pemberat, W tergantung oleh dua tali. Gambar rajah vector yang

    manakah mewakili tindakan daya T1, T2 dan W pada pemberat itu.?

    A

    B

    C

    D

    300600

    W

    T1 T2

    T2

    DIAGRAM 3

    W

    T1

    T2

    T2

    T1

    W

    W

    T1

    W

    T1

    T2

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    13. Diagram 4 shows a student trying to lift a load. Calculate the work done by the student.Rajah 4 menunjukkan seorang pelajar cuba mengangkat suatu beban.Kirakan kerja yangdilakukan oleh pelajar.

    A 0.4 J

    B 4 J

    C 40 J

    D 400 J

    E 4000 J

    14.

    The graph shows the relationship between the extensions, e of a spring with weight, W

    hanging on it. Which of the following statement about the graph is correct?Graf menunjukkan hubungan antara pemanjangan, e suatu spring dengan berat, W yangtergantung pada nya. Pernyataan yang manakah betul tentang graf itu.

    A The gradient of the graph represents the spring constant.Kecerunan graf mewakili pemalar spring.

    B W is inversely proportional to e.

    W berkadar songsang dengan e.C The equation of the graph is W =

    2ke

    2

    1.

    Persamaan graf ialah W =2

    ke2

    1.

    D The shaded area represents the total weight hanging on the spring.Kawasan berlorek mewakili jumlah berat yang tergantung pada spring.

    2 kg

    2 m

    W/N

    e /m0

    DIAGRAM 4

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    15. Diagram 5 shows a school bag.Rajah 5 menunjukkan sebuah bag sekolah

    What is the function of x?Apakah fungsi x?

    A to increase weight and to increase pressureUntuk menambahkan berat dan menambahkan tekanan

    B to increase surface area and to decrease pressure

    Untuk menambahkan luas permukaan dan mengurangkan tekanan

    C to decrease weight and to decrease pressureUntuk mengurangkan berat dan mengurangkan tekanan

    D to decrease surface area and to increase weightUntuk mengurangkan luas permukaan dan menambahkan berat

    16. Water takes a shorter time to boil when heated at high altitude regions than at low

    altitude regions, although the same amount of energy is used.

    This observation is due to

    Air lebih cepat mendidih apabila dipanaskan di kawasan tanah tinggi berbanding di kawasan

    rendah walaupun menggunakan jumlah tenaga yang sama.. Pemerhatian ini disebabkan

    A the temperature is lower at high altitude regionssuhu lebih rendah di kawasan tanah tinggi

    B the atmospheric pressure is lower at high altitude regionstekanan atmosfera lebih rendah di kawasan tanah tinggi

    C the air is less damp at high altitude regionskelembapan udara lebih rendah di kawasan tanah tinggi

    D the rate of heat loss is faster at high altitude regions

    kadar pembebasan haba lebih cepat di kawasan tanah tinggi

    Diagram 5

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    17. Which one of the following instruments is used to measure gas pressure ?Yang manakah di antara alat berikut di gunakan untuk mengukur tekanan gas ?

    A Manometer

    Manometer

    B Fortins barometerBarometer Fortin

    C Mercury in Glass BarometerBarometer merkuri

    D Hydrometerhidrometer

    18. Diagram 6 shows a stationary hot air balloon. The total mass of the balloon and load is

    1000 kg. The volume of the balloon is 1000 m3

    and the density of the surrounding air is1.25 kg m3.Rajah 6 menunjukkan sebuah belon udara panas yang pegun.Jisim belon dan beban ialah 1000kg. Isipadu belon ialah 1000 m

    3dan ketumpatan udara sekeliling ialah 1.25 kg m

    3.

    What is the tension in the rope?Berapakah ketegangan tali?

    A 1.96 x 103 N

    B 2.25 x 103 N

    C 9.80 x 103 N

    D 1.22 x 10

    4

    NE 2.21 x 10

    4 N

    Rope

    load

    Hot air ballon

    DIAGRAM 6

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    19 . Diagram 7 shows a piece of paper being blown by the wind.Gambar rajah menunjukkan keadaan sekeping kertas apabila angin bertiup.

    wind

    DIAGRAM 7

    The paper is lifted up and started to fly. This is due to

    Kertas itu terangkat naik dan terbang. Ini disebabkan oleh

    A the density of the paper is less than the air.ketumpatan kertas lebih kecil daripada ketumpatan udara.

    B the lifting force is equal to the weight of the paper.daya angkat pada kertas seimbang dengan berat kertas itu.

    C air speed is lower above the paper compare to air speed below of the paper.laju aliran udara di atas kertas lebih rendah daripada di bawah.

    D air pressure above the paper is lower than air pressure below the paper.tekanan udara di atas kertas lebih rendah daripada di bawah.

    20. Diagram 8 shows a few hot steam dumplings cooked using steamer.

    Rajah 8 menunjukkan beberapa biji kuih pau yang dimasak menggunakan periuk kukus.

    The dumplings are cooked using the concept of

    Kuih pau tadi dimasak menggunakan konsep

    A thermal equilibrium

    keseimbangan terma

    B heat capacity

    muatan haba

    C latent heat

    haba pendam

    paper

    floor

    DIAGRAM 8

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    21.

    The graph shows the heating curve of a 500 g liquid P by a 60 W immersion heater.

    The specific heat capacity of the liquid Q isGraf menunjukkan pemanasan 500 g cecair P oleh pemanas rendam 60 W.Muatan haba tentu cecair P ialah

    A 220 J kg-1

    oC

    -1

    B 720 J kg-1

    oC

    -1

    C 1260 J kg-1

    oC

    -1

    D 1680 J kg-1

    oC

    -1

    22. The latent heat of fusion of a substance is the quantity of heat required toHaba pendam pelakuran bagi sesuatu bahan ialah kuantiti haba yang diperlukan untuk

    A. separate the molecules in the solid substance so that they are free to move.memisahkan molekul dalam pepejal supaya bebas bergerak

    B increase the kinetic energy of the molecules in the solid substance.meningkatkan tenaga kinetic molekul dalam pepejal

    C increase the temperature of the substance

    meningkatkan suhu bahan

    23. The air pressure in a car tyre is increased after the car has travelled a long distance

    becauseTekanan udara di dalam tayar kereta meningkat selepas kereta bergerak pada jarak jauh kerana

    A the average velocity of the air molecules in the tyre has decrease.

    Purata halaju molekul udara dalam tayar menurun

    B the temperature of the air in the tyre has increased.

    suhu udara dalam tayar telah meningkat

    C the size of the air molecules in the tyre has increased.

    saiz molekul udara dalam tayar telah meningkat

    1 2 3 4 5 6

    50

    40

    30

    20

    10

    0t / minute7

    60

    70

    Temperature /oC

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    24. Diagram 9 shows an image form by a plane mirror. Where is the object placed?Rajah menunjukkan satu imej dihasilkan oleh satu cermin satah. Di manakah objek itumesti diletakkan?

    25. Diagram 10 shows a light ray directed into a glass block. Which is the angle ofrefraction?

    Rajah menunjukkan suatu sinar ditujukan kea rah suatu blok kaca. Yang manakah sudut biasan?

    26. Among the diagrams A, B and C, which demonstrates the phenomenon of the totalinternal reflection.Di antara rajah-rajahA, B dan C, yang manakah menunjukkan fenomena pantulan dalam penuh?

    image

    DIAGRAM 9

    DIAGRAM 10

    Air

    Liquid-Y

    A

    Air

    Liquid-Y

    90o

    B

    B

    C

    Air

    Liquid-Y

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    27. In the following ray diagram, the image formed on the screen is not clear (notsharp).

    Dalam rajah sinar berikut, imej yang dibentukkan pada skrin adalah kabur.

    Which of the following changes will produce a sharp image on the screen?Antara berikut, yang manakah perubahan yang akan menghasilkan satu imej yang jelas pada

    skrin?

    A Replace the lens with another convex lens of longer focal length.Gantikan kanta dengan sebuah kanta cembung yang mempunyai jarak fokus lebih

    panjang

    B Replace the lens with another concave lens of shorter focal lengthGantikan kanta dengan sebuah kanta cekung yang mempunyai jarak fokus lebih pendek

    C Move the object further from the lensGerakan objek itu lebih jauh daripada kanta

    D Move the lens closer to the object

    Gerakan kanta itu lebih dekat dengan objek

    28 The condition of a wave in a ripple tank at time, t= 0 second is represented by the

    displacement,y against distance,x graph shown below.

    Keadaan gelombang dalam suatu tangki riak pada masa t = 0 saat adalah diwakili oleh graf

    sesaran, y melawan jarak, x seperti dibawah.

    0 x

    y Direction of propagation

    Arah perambatan

    Screen

    Skrin

    Object

    Objek

    Lens

    kanta

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    Which of the following correctly shows the condition of the wave a little moment later?

    Antara berikut, yang manakah menunjukkan keadaan gelombang itu selepas sedikit masa?

    29.

    Diagram 11 shows one method of harnessing solar energy. The light phenomenon used bythis system is

    Rajah 11 menunjukkan satu cara untuk mengumpulkan tenaga cahaya matahari. Fenomenacahaya yang digunakan ialah

    A. Refraction Pembiasan

    B. Reflection Pantulan

    C. Diffraction Belauan

    D. Interference Interferens

    E. Polarisation Pengutuban

    A. B.

    C.D.

    0 x

    y

    0 x

    y

    0 x

    y

    0 x

    y

    Diagram 11Rajah 11

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    30. A plane wave has a wavelength of2.0 cm and a velocity of 8.0 cms-1

    as it movesover the surface of shallow water. When the plane wave moves into an area of greater,

    depth, its velocity becomes 12.0 cms-1

    . Calculate the wavelength of the wave in the areaof greater depth?Gelombang satah yang mempunyai panjang gelombang 2.0 cm dan halaju 8.0 cms

    -1apabila ia

    melalui kawasan yang cetek. Apabila gelombang satah berkenaan bergerak ke kawasan yang

    lebih dalam, halajunya menjadi 12.0 cms-1

    . Hitungkan panjang gelombang satah itu di kawasanyang lebih dalam.

    A 3.0 cm

    B 3.5 cm

    C 4.0 cm

    D 4.5 cm

    E 5.0 cm

    31. Which of the following diagrams shows the wave pattern correctly when plane waves

    pass through a gap?Rajah manakah menunjukkan corak gelombang yang betul apabila gelombang satah melepasisuatu celah.

    A

    B

    C

    D

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    32. Diagram 12 shows the phenomenon of interference of water waves.Rajah menunjukkan fenomena inteferens gelombang air.

    Key:

    S1 : Wave source 1

    S2 : Wave source 2

    What is the wavelength of the water waves ?Berapakah panjang gelombang bagi gelombang air tersebut?

    A 0.8 cm

    B 1.2 cm

    C 3.2 cm

    D 5.0 cmE 20.0 cm

    DIAGRAM 12

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    33. Diagram 13 shows a boy shouting at a school building.Rajah 13 menunjukkan seorang budak lelaki menjerit ke arah bangunan sekolah

    Calculate the time taken by the boy to hear the echo of his voice.

    [The speed of sound in air is 340 m s-1]Hitung masa yang diambil oleh budak lelaki tersebut untuk mendengar gema suaranya.

    [Laju bunyi di udara ialah 340 m s-1]

    A 0.07 s

    B 0.13 s

    C 0.26 s

    D 3.78 s

    E 7.26 s

    34. The resistance of the filament of a lamp increases when its temperature increases. If the

    potential difference across the filament is fixed, which of the following graphs show its

    power,Pagainst time, t is correct?

    Rintangan satu lampu filamen bertambah apabila suhu filamen bertambah. Jika lampu itudibekalkan voltan yang tetap, antara graf kuasa, P melawan masa, t berikut, yang manakah

    betul apabila bekalan voltan itu dihidupkan?

    A

    P

    t0

    B

    P

    t0

    C

    P

    t0

    D

    P

    t0

    DIAGRAM 13

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    35. The diagram 14 shows two resistors, each with a resistance of2 connected in parallelin a circuit.Gambarajah menunjukkan dua perintang, setiap satu perintang bernilai 2 disambungkan

    secara sesiri di dalam litar.

    What is the reading on the ammeter ?Berapakah bacaan ammeter ?

    A 1.5 A

    B 3.0 A

    C 4.5 A

    D 6.0 A

    E 7.5 A

    36. An electrical appliance has a resistance of250 and it requires 200 V to operate.

    What is its power rating ?Satu alat elektrik mempunyai rintangan 250 dan memerlukan 200 Vuntuk beroperasi.Berapakah kuasanya ?

    A 100 W

    B 120 W

    C 140 W

    D 160 W

    E 180 W

    DIAGRAM 14

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    37. Diagram 15 shows a circuit before and after the switch is closed.Rajah 15 menunjukkan litar sebelum dan litar selepas suis di tutup.

    Adrop in the voltmeter reading occurs becauseBacaan voltmeter yang menurun adalah disebabkan oleh

    A energy is needed to move charges in the circuittenaga diperlukan untuk menggerakkan cas-cas di dalam litar

    B voltage is needed to accelerate charges in the circuitvoltan diperlukan untuk memecutkan cas-cas di dalam litar

    C energy is needed to accumulate charges in the circuittenaga diperlukan untuk mengumpukan cas-cas di dalam litar

    D voltage is lost across the internal resistance of the cell

    Voltan hilang disebabkan oleh rintangan dalam sel

    DIAGRAM 15

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    38. A coil of wire wound around an iron rod is connected in a circuit as shown in Diagram16.Satu gegelung dawai yang mengelilingi satu rod besi disambungkan di dalam litar seperti

    di bawah.

    The number of nails attracted to the iron rod will increase ifBilangan jarum-jarum yang ditarik oleh rod besi akan bertambah jika

    A a smaller current is usedarus yang lebih kecil digunakan

    B the number of turns of the coil is increasedbilangan gegelung ditambah

    C the distance between the coils is increasedjarak antara gegelung- gegelung ditambah

    D an iron rod with a larger diameter is usedsatu rod besi yang lebih besar diameternya di gunakan

    39. Diagram 18 shows a current-carrying conductor placed between two magnet poles.Rajah 18 menunjukkan konduktor yang membawa arus diletakkan di antara dua medan

    magnet.

    Of the marked directions A, B, C and D , which shows the direction of motion of the

    conductor ?Daripada arah yang ditunjukkan oleh A, B, C dan D, yang mana satukah arah gerakankonduktor itu ?

    DIAGRAM 16

    DIAGRAM 18

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    40. Which graph shows the output of a simple d.c. generator?Graf manakah menunjukkan output penjana a.t. yang mudah.

    41. Diagram 19 shows a transformer.Rajah 19 menunjukkan sebuah transformer.

    What is the voltmeter reading?

    Berapakah bacaan voltmeter?

    A 1.2V

    B 12V

    C 120V

    D 1200V

    DIAGRAM 19

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    42. When electricity is transmitted over long distances, energy is wasted. How can thewasted energy be kept as small as possible?Bila elektrik dihantarkan melalui jarak yang jauh, tenaga dibazirkan. Bagaimanakah

    pembaziran tenaga dapat diminimumkan seboleh mungkin.

    A Keep the current in the transmission lines as large as possible.

    Memastikan arus dalam kabel penghantaran sebesar yang mungkinB Keep the power supplied to the transmission lines as large as possible.

    Memastikan kuasa yang dibekalkan ke kabel penghantaran sebesar yang mungkin.

    C Keep the resistance of the transmission lines as large as possible.Memastikan rintangan dalam kabel pengharan sebesar yang mungkin.

    D Keep the voltage supplied to the transmission lines as large as possible.Memastikan voltan yang dibekalkan kepada kabel penghantaran sebesar yangmungkin.

    43. Which of the following is not a property of cathode rays?Antara berikut yang manakah bukan sifat sinar katod?

    A It is a type of electromagnetic radiationIa adalah satu jenis sinaran radioaktif

    B It can be deflected by a magnetic fieldIa boleh dipesong oleh medan magnet

    C It travels at high speedIa bergerak pada laju tinggi

    D Its kinetic energy can be converted to lightTenaga kinetiknya boleh ditukar kepada cahaya

    44. Diagram 20 shows four diodes connected to a direct current power supply.

    Rajah 20 menunjukkan empat diod yang disambung kepada bekalan kuasa arus terus.

    Which diodes are forward bias? /Diod yang manakah dipincang ke hadapan?

    A P and R

    B P and SC Q and R

    D Q and S

    P

    Q

    R

    S

    DIAGRAM 20

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    45. Diagram 21 shows a transistor circuit.Rajah 21 menunjukkan satu litar transistor.

    What components should be connected at terminals WX and terminals YZ to make the

    bulb L lights up when the surrounding is dark?

    Komponen apakah perlu disambung kepada terminalWX dan YZ supaya mentol L akanmenyala apabila keadaan persekitaran menjadi gelap?

    Terminals WX Terminals YZ

    A Light dependent resistor ThermistorPerintang peka cahaya Termistor

    B Resistor Light dependent resistor Perintang Perintang peka cahaya

    C Thermistor ResistorTermistor Perintang

    D Capacitor ResistorKapasitor Perintang

    L

    X

    W

    Z

    Y

    DIAGRAM 21

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    46. Diagram 22 shows a combination of two logic gates.

    Rajah 22 menunjukkan gabungan dua get logik.

    DIAGRAM 22

    Diagram 23 show the signals applied to the inputs P and Q.

    Rajah 23 menunjukkan isyarat-isyarat yang disambungkan ke inputP dan Q.

    DIAGRAM 23

    Which of the following shows the waveform from the output S?

    Antara berikut yang manakah menunjukkan bagi output S?

    A C

    B D

    Voltage

    Voltan

    Time

    Masa0

    Input P

    0

    Input Q

    Voltage

    Voltan

    Time

    Masa

    0

    Voltage

    Voltan

    Time

    Masa0

    Voltage

    Voltan

    Time

    Masa

    0

    VoltageVoltan

    Time

    Masa0 Time

    Masa

    VoltageVoltan

    Q

    P

    S

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    47. An atom contains 17 protons, 18 neutrons and 17 electrons. What is the proton numberand nucleon number of this atom?

    Satu atom mengandungi 17 proton, 18 neutron and17 elektron. Berapakan nombor proton dan

    nombor nukleon bagi atom ini?

    Proton number/Nombor proton

    Nucleon number/ Nombor nukleon

    A 17 34

    B 17 35

    C 18 34

    D 18 35

    48. A ratemeter records a count rate of 1400 counts per minute at 2.00 p.m. from a

    radioactive source. At 3.15 p.m. on the same day, the count rate has dropped to 175counts per minute.

    What is the half-life of the radioactive source?

    Sebuah meter kadar mencatat kadar pembilangan1400 pembilangan per minit pada pukul2.00

    petang daripada suatu sumber radioaktif. Pada pukul3.15 petang hari yang sama, kadarpembilangan telah berkurang kepada175 pembilangan per minit. Berapakah setengah hayatsumber radioaktif itu?

    A 15 minutes

    B 25 minutes

    C 40 minutes

    D 60 minutes

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    49. Diagram 24 shows the path of -particles and -particles in the region R.

    Rajah 24 menunjukkan lintasan bagi zarah- dan zarah- dalam kawasan R.

    Which of the following shows the field found in the region R?

    Antara berikut yang manakah menunjukkan medan yang terdapat dalam kawasan R?

    A B

    C D

    R

    R

    Electric field

    R

    Electric field

    R

    Magnetic field

    x

    x

    x

    x

    x

    x

    x

    x

    x

    x

    x

    x

    x

    x

    x

    x

    R

    Magnetic field

    Medan magnet Medan magnet

    Medan elektrik Medan elektrik

    DIAGRAM 24

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    50. The mass defect of a radioactive decay is 0.0018 u. What is the energy released due this

    mass defect?

    [1 u = 1.66 x 1027 kg]

    Kecacatan jisim bagi suatu reputan radioaktif ialah 0.0018 u.Berapakah tenaga yang

    dibebaskan akibat daripada cacat jisim ini?

    A 8.96 x 1022

    J

    B 4.98 x 1019

    J

    C 1.62 x 1014

    J

    D 2.69 x 1013

    J