Selangor-physics P2-Trial SPM 2009

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    Nama:.. .. Tingkatan:....................

    JABATAN PELAJARAN NEGERI SELANGORPROGRAM PENINGKATAN PRESTASI

    SAINS DAN MATEMATIK SPM2009

    FIZIKKERTAS 2

    Dua jam tiga puluh minit

    JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU.

    Untuk Kegunaan Pemeriksa

    Bahagian SoalanMarkah

    PenuhMarkah

    Diperolehi

    A

    1 4

    2 5

    3 6

    4 7

    5 8

    6 8

    7 10

    8 12

    B 9 2010 20

    C11 20

    12 20

    Jumlah Besar

    Kertas ini mengandungi 23 halaman bercetak

    4531/2

    Fizik

    Kertas 2

    SEPT 2009

    2 Jam

    1.This question paper consists of three sections:Section A, Section B andSection C.

    2.Answer all questions in Section A. Write youranswers for Section A in the space provided on

    the question paper.3.Answer one question from Section B and onequestion fromSection C. Write your answers forSection B and Section C on the lined pages atthe end of this question paper. Answer questionsin Section B and Section C in detail. You mayuse equations, diagrams, tables, graphs and othersuitable methods to explain your answer.

    4.Show your working, it may help you to get marks.5.If you wish to cancel any answer, neatly cross out

    the answer.6.The diagrams in the questions provided are not

    drawn to scale unless stated.

    7. A list of formulae is provided on page 2.8.The marks allocated for each question or part of aquestion are shown in brackets.

    9.The time suggested to answer Section A is 90minutes, Section B is 30 minutes and Section C is30 minutes.

    10.You may use a non-programmablescientificcalculator.

    11.Hand in this question paper at the end of theexamination.

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    The following information may be useful. The symbols have their usual meaning.Maklumat berikut mungkin berfaedah. Simbol-simbol mempunyai makna yang biasa.

    1. a = t

    uv

    2. v2 = u2 + 2as

    3. s = ut+2

    1at

    2

    4. Momentum = mv

    5. F = ma

    6. Kinetic energy = mv2

    7. Gravitational potential energy = mgh

    8. Elastic potential energy =2

    1Fx

    9. Power, P = energyi. time

    10. =V

    m

    11. Pressure, p= hg

    12. Pressure,p=A

    F

    13. Heat, Q = mc

    14. Heat, Q = m

    15. P1V1 = P2V2

    16. V1 = V2T1 T2

    17.P1 = P2T1 T2

    18.T

    PV= constant

    19. n =r

    i

    sin

    sin

    20. n = real depthapparent depth

    21.vuf

    111+=

    22. Linear magnification, m = vu

    23. P = 1/ f

    24. v = f

    25. =D

    ax

    26. Q =It

    27. E = VQ

    28. V = IR

    29. E = V + Ir

    30. Power, P = VI

    31.P

    S

    P

    S

    V

    V

    N

    N=

    32. Efficiency =PP

    SS

    VI

    VIx 100%

    33. eV = mv2

    34. E = mc2

    35. g = 10 ms-2

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    Section A( 60 marks )

    Answer all questionsJawab semua soalan

    1. Diagram 1 shows parallel light rays propagating towards a lens, P. F is thefocal point of the lens.Rajah 1 menunjukkan sinar cahaya selari memasuki sebuah kanta, P. F adalah titik fokus kanta.

    (a) Lens P is a ..Kanta P adalah..

    Tick () at the correct answerTandakan () pada jawapan yang betul

    [1 mark]

    (b) What is the focal length of lens P ?Berapakah jarak fokus kanta P ?

    .......................................................................................................................

    [1 mark]

    (c) What happens to the focal length of the lens if a thicker lens is used ?Apakah yang berlaku kepada jarak fokus kanta jika kanta yang lebih tebal digunakan ?

    ......................................................................................................................[1 mark]

    (d) Name the phenomenon which enables the parallel rays to be focused at point F.Namakan fenomena yang menyebabkan sinar cahaya selari itu ditumpukan pada titikF.

    ...................................................................................................................

    [1 mark]

    convex lenskanta cembung

    concave lenskanta cekung

    Diagram 1Rajah 1

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    2. A student used a Geiger-Muller tube to examine a radioactive source which onlyemits one type of radiation. An average count rate of 5 counts per minute is obtainedwhen the distance between the radioisotope and the source is more than 10 cm.

    Seorang murid menggunakan Tiub Geiger-Muller untuk mengesan sumber radioaktif yanghanya memancarkansatu jenis sinaran sahaja. Purata kadar bilangan ialah 5 bilangan perminit apabila radioisotop berada lebih 10 cm dari sumber.

    Diagram 2Rajah 2

    The Geiger-Muller tube is moved closer until it is 2 cm from the source. Thereadings are recorded for 80 minutes and the results are as shown in the Table 2.

    Tiub Geiger-Muller itu digerakkan sehingga berada 2 cm daripada sumber. Bacaannya

    direkod untuk 80 minit dan keputusannya ditunjukkan dalam Jadual 2.

    Time (minutes)Masa(minit)

    0 20 40 60 80

    Count rateKadar bilangan

    101 65 43 29 21

    Table 2Jadual 2

    (a) What type of radiation is emitted by the source?Apakah jenis sinaran yang dihasilkan oleh sumber itu?

    ...............................................................................................................................[ 1 mark]

    (b) Give a reason why an average count rate of 5 counts per minute is obtained when thedistance between the radioisotope and the source is more than 10 cm.Berikan satu sebab mengapa purata kadar bilangan bagi 5 bilangan per minit diperolehi apabilajarak di antara radioisotope dan sumber lebih daripada 10 cm.

    ...............................................................................................................................[ 1 mark]

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    (c) From Table 2, sketch a graph of count rate against time for the source.Daripada Jadual 2, lakarkan graf kadar bilangan melawan masa bagi sumber tersebut.

    [ 2 marks]

    (d) From the graph in 2(c), determine the half-life of the radioactive source used.Daripada graph dalam 2(c), tentukan separuh-hayat sumber radioaktif yang digunakan.

    ...................................................................................................................................

    [1 mark]

    3. Diagram 3 shows a model of an electrical energy transmission system set up in a

    school laboratory. The total resistance of the transmission cables is 4 and thecurrent passing through the transmission cables is 2 A.

    Rajah 3 menunjukkan model penghantaran tenaga elektrik yang dipasng di makmal

    sekolah.Jumlah rintangan pada kabel transmisi ialah 4dan arus yang mengalir melalui kabelialah 2 A.

    Diagram 3Rajah 3

    (a) What is meant by current?Apakah yang dimaksudkan dengan arus?

    ...................................................................................................................................

    [1 mark]

    Transmission cable /Kabel penghantar

    Power pointBekalan kuasa

    Transformer M Transformer

    Light bulb /MentolLight bulb invillage/Mentol dikampung

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    (b)(i) What will happen to the brightness of the light bulb in the village when cables witha larger diameter are used?Apakah yang akan berlaku kepada kecerahan `mentol di kampong jika kabel yang digunakanmempunyai diameter yang lebih besar?

    ..[1 mark]

    (ii) Give one reason for your answer in (b)(i).Berikan alasan bagi jawapan anda dalam (b)(i).

    ..[1 mark]

    (c) The potential difference of the light bulb in the village is increased by usingtransformer M. Name the type of transformer M.Beza keupayaan `mentol di kampong ditingkatkan dengan menggunakan transformer M.Namakan jenis transformer M.

    ...[1 mark]

    (d) Calculate the power loss in the transmission cable.Hitung jumlah kuasa yang hilang dalam kabel transmisi.

    [2 marks]

    4. Diagram 4.1 shows an object hanging from a spring balance. The reading of the springbalance is 3.0 N. The object is then immersed in water and the reading is now 2.5 N asshown in Diagram 4.2.Rajah 4.1 menunjukkan suatu objek tergantung pada sebuah neraca spring. Bacaan padaneraca ialah 3.0 N. Objek itu kemudiannya direndam ke dalam air dan bacaannya ialah 2.5 Nseperti dalam Rajah 4.2

    Diagram 4.1 Diagram 4.2Rajah 4.1 Rajah 4.2

    2.5 N

    3.0 N

    ObjectObjek

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    (a) What is the weight of the object?Berapakah berat objek tersebut?

    ...........................................................................................................................................

    [1 mark]

    (b) Another force, F is acting on the object in Diagram 4.2.Suatu daya yang lain, F bertindak ke atas objek dalam Rajah 4.2.

    (i) Mark and label the force, F in Diagram 4.2Tandakan dan labelkan daya, F dalam Rajah