JABATAN PENDIDIKAN KELANTAN

SULIT Nama : ………………………………………………….

4531/2

FIZIK Tingkatan : …………………………………………….

Kertas 2

2 ½ jam

FIZIK – SET 3 KERTAS 2

Masa : 2 Jam 30 minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1. Kertas soalan ini adalah dalam dwibahasa.

2. Soalan dalam bahasa inggeris mendahului

soalan sepadan dalam bahasa Melayu

3. Calon dibenarkan menjawab keseluruhan

atau sebahagian soalan sama ada dalam bahasa

Inggeris atau bahasa Melayu.

4 Calon dikehendaki membaca maklumat

di halaman belakang kertas soalan ini

Kertas Ujian ini mengandungi 31 muka surat bercetak ……..…./LIHAT SEBELAH

Untuk Kegunaan Pemeriksa

Bahagian

Soalan

Markah

Penuh

Markah

Diperolehi

A

1 4

2 5

3 6

4 7

5 8

6 8

7 10

8 12

B

9 20

10 20

C

11 20

12 20

Jumlah

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

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

1. a = v – u 16. Power, P = energy

t time

2. v2 = u

2 + 2 as 17. V = IR

3. s = ut + 1 at2 18. Power, P = IV

2 Kuasa

4. Momentum = mv 19. Ns = Vs

Np Vp

5. F = ma 20. Efficiency = Is Vs x 100 %

(kecekapan) Ip Vp

6. Kinetic energy = 1 mv2

Tenaga kinetik 2 21. 1 = 1 + 1

f u v

7. Gravitational potential energy = mgh 22. n = sin i

Tenaga keupayaan graviti sin r

8. Elastic potential energy = 1 Fx 23. n = Real depth

Tenaga keupayaan kenyal 2 Apparent depth

9. = m 24. λ = ax

V D

10. Pressure, P = hg. 25. Q= It

Tekanan

11. Pressure, P = F 26. E = I (R + r)

Tekanan A

27. eV = ½ mv2

12. Heat, Q = mc

Haba 28. g = 10 ms-2

13. PV = Constant (pemalar)

14. E = m c2

15. v = f

SECTION A

BAHAGIAN A

[60 marks]

[60 markah]

Answer all questions in this section.

Jawab semua soalan dalam bahagian ini.

1. Diagram 1 shows a boy is shouting in front of a building . After 1 second, an

echo is heard. Rajah 1 menunjukkan seorang budak berteriak di hadapan sebuah bangunan. selepas satu saat, satu gema kedengaran.

Diagram 1

Rajah 1

(a) Complete the sentence below by ticking ( √ ) the correct box.

Lengkapkan pernyataan di bawah dengan (√) pada kotak yang betul Sound wave is a Gelombang bunyi adalah

transverse wave gelombang melintang longitudinal wave gelombang membujur

[ 1 mark ] [1 markah]

(b) State the wave phenomenon that occurred. Nyatakan fenomena yang terlibat ………………………………………………………………………………………………

[ 1 mark ] [1 markah]

(c) State the change in the velocity and frequency of the sound wave after it hit the building Nyatakan perubahan dalam halaju dan frekuansi gelombang bunyi selepas menghentam bangunan

(i) Velocity Halaju …………………………………………………………………………………………….. (ii) Frequency frekuansi ………………………………………………………………………………………………

[ 2 marks] [2 markah]

2 Diagram 2.1 shows a container filled with liquid X. Liquid X spurts through the hole

at horizontal distance, d, due to pressure.

Rajah 2.1 menunjukkan sebuah bekas berisi cecair X. Cecair X memancut keluar

melalui lubang pada jarak mengufuk , d, disebabkan tekanan.

Diagram 2.1

Rajah 2.1

(a) What is the meaning of pressure?

Apakah maksud tekanan?

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

[1 mark]

[1 markah]

(b) Give two factors that affect the pressure of liquid.

Beri dua faktor yang mempengaruhi tekanan cecair.

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

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

[2 marks]

[2 markah]

(c) Calculate the pressure of liquid X at the hole. The density of liquid X is

900 kgm-3

.

Hitung tekanan cecair X pada lubang itu. Ketumpatan cecair X ialah is

900 kgm-3

.

[2 marks]

[2 markah]

(d) What happen to the horizontal distance, d, when liquid X is replaced by a higher

density of liquid.

Apakah yang berlaku kepada jarak mengufuk, d, apabila cecair X digantikan

dengan cecair yang lebih tumpat.

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

[1 mark]

[1 markah]

3. Diagram below shows a simple electromagnet.

Rajah di bawah menunjukkan satu electromagnet ringkas.

X

(a) What is the meaning of electromagnet? Apakah maksud elektromagnet? ……………………………………………………………………………………………….. ………………………………………………………………………………………………..

[1 mark] [1 markah]

(b) When the switch is turned on: Bila suis dihidupkan: (i) Draw the pattern of magnetic field on Diagram above. Lukisan corak medan magnet pada Rajah di atas.

[ 1 mark] [ 1markah]

(ii) State the magnetic pole at X Nyatakan kutub magnet pada X. ………………………………………………………………………………………….

[ 1 mark] [ 1markah]

(c) State what happens to the pin when switch is switch off Nyatakan apa yang berlaku kepada pin itu bila suis dimatikan. ………………………………………………………………………………………..

[ 1 mark] [ 1markah]

(d) State on suggestion to increase the strength of electromagnet. Nyatakan satu cara untuk meningkatkan kekuatan electromagnet. …………………………………………………………………………………………...

[ 1 mark] [ 1markah]

(e) State one application of electromagnet. Nyatakan satu kegunaan electromagnet. ……………………………………………………………………………………………

[ 1 mark] [ 1markah]

4. Diagram 4.1 below shows an object, O, is placed in front of a lens. The focal point

of that lens is given as F. Rajah 4.1 di bawah menunjukkan satu objek, O, diletakkan di hadapan sebuah

kanta. Titik fokus kanta tersebut diberikan sebagai F. Diagram 4.1 Rajah 4.1 Based on diagram 4.1, Berdasarkan rajah 4.1, (a) name the type of lens. Namakan jenis kanta tersebut. ……………………………………………………………………………………

[ 1 mark] [ 1 markah ]

F F O

(b) (i) draw ray diagram from the object O, to show how the image of the object is formed. lukiskan gambarajah sinar dari objek O, untuk menunjukkan bagaimana

imej terbentuk. [ 3 marks]

[3 markah ] (ii) state one characteristic of the image formed. nyatakan satu ciri imej yang terbentuk. …………………………………………………………………………………… [ 1 mark / markah ] (c) An object is placed 30 cm in front of that lens and the focal length 20 cm.

Calculate the image distance formed by the lens. Satu objek diletakkan 30 cm di hadapan kanta tersebut dan panjang fokus kanta itu adalah 20 cm. Kirakan jarak imej yang terhasil daripada kanta itu.

[ 2 marks] [2 markah ]

5. Diagram 5.1 and Diagram 5.2 shows an experiment to study the relationship between the temperature and the pressure of a gas. Diagram 5.1 shows the beaker is heated for 5 minutes while Diagram 5.2 shows the beaker is heated for 10 minutes. Rajah 5.1 dan Rajah 5.2 menunjukkan satu eksperimen yang dilakukan untuk mengkaji hubungan di antara suhu dan tekanan suatu gas. Rajah 5.1 menunjukkan bikar dipanaskan untuk 5 minit manakala Rajah 5.2 menunjukkan bikar dipanasakan selama 10 minit.

Diagram 5.1 Diagram 5.2 Rajah 5.1 Rajah 5.2 Based on diagram 5.1 and 5.2, Berdasarkan rajah 5.1 dan 5.2, (a) State the most suitable measuring instrument to be used at X. Nyatakan alatan pengukuran yang paing sesuai digunakan di X. ……………………………………………………………………………………

[ 1 mark ] [1 markah ]

(b) Compare: Bandingkan : (i) Temperature trapped air inside the round flask. Suhu udara terperangkap di dalam kelalang bulat. ……………………………………………………………………………………

[ 1 mark ]

[1 markah ] (ii) The reading of the measuring instrument X. Bacaan alat pengukuran X. ……………………………………………………………………………………

[ 1 mark ] [ 1 markah ]

(iii) The volume of trapped air inside round flask. Isipadu udara terperangkap di dalam kelalang bulat. ……………………………………………………………………………………

[ 1 mark ] [1 markah ]

(c) Using your answer in 5 (b)(i) and 5 (b)(ii), state a relationship between the

temperature of trapped air and the reading of measuring instrument X. Menggunakan jawapan anda di 5(b)(i) dan 5(b)(ii), nyatakan hubungan di

antara suhu udara terperangkap dan alat pengukuran X. ……………………………………………………………………………………

[ 1 mark] [1 markah ]

(d) Using the Kinetic Molecular Theory, explain your answer in 5 (c). Menggunakan Teori Kinetik Molekul, terangkan jawapan anda di 5 (c). ……………………………………………………………………………………

…………………………………………………………………………………… [ 2 marks ]

[ 2 markah ] (e) Name a physics law involved in the above observation. Namakan satu hukum fizik yang terlibat dalam pemerhatian di atas. ……………………………………………………………………………………

[ 1 mark ] [ 1markah]

6. Diagram 6.1 shows a set-up of apparatus when measuring the radioactivity of

radioactive substances using a G-M tube which is connected to a rate meter.

Rajah 6.1 menunjukkan susunan radas apabila mengukur keradioaktifan bagi

bahan radioaktif dengan menggunakan tiub G-M yang disambung kepada meter

kadar.

Diagram 6.1

Rajah 6.1

(a) What is the meaning of radioactivity?

Apakah yang dimaksudkan dengan keradioaktifan?

………………………………………………………………………………………

[1 mark]

[1 markah]

(b) Give a reason why the reading of the rate meter does not drop to ‘zero’

when the radioactive substance is removed.

Beri satu sebab mengapa bacaan meter kadar tidak menjadi ‘sifar’

apabila bahan radioaktif dialihkan.

…………………………………………………………………………………..

[1 mark]

[1 markah]

Diagram 6.2 shows an activity against time graph for radioactive substance X and Y.

Rajah 6.2 menunjukkan graf aktiviti melawan masa bagi bahan radioaktif X dan

Y.

Diagram 6.2

Rajah 6.2

Based on Diagram 6.2, compare

Berdasarkan Rajah 6.2, bandingkan

(i) The rate of decay for X and Y

Kadar pereputan bagi X dan Y

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

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

[1 mark]

[1 markah]

(ii) The half life of X and Y

Separuh hayat bagi X dan Y

…………………………………………………………………………….

…………………………………………………………………………….

[1 mark]

[1 markah]

(iii) The percentage remains undecayed after 30 minutes.

Peratus yang belum mereput selepas 30 minit.

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

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

[1 mark]

[1 markah]

(d) Based on the answers in 6(c), state the relationship between the rate of

decay and

Berdasarkan jawapan di 6(c), nyatakan hubungan antara kadar pereputan

dan

(i) the half life of radioactive substance.

separuh hayat bagi bahan radioaktif.

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

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

[1 mark]

[1 markah]

(ii) the activity for the substance.

Aktiviti bagi bahan.

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

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

[1 mark]

[1 markah]

(e) On the Diagram 6.2, mark with “ T” to show the half life of substance X.

Pada Rajah 6.2, tandakan “T” untuk menunjukkan separuh hayat bagi

bahan X.

[1 mark]

[1 markah]

7 Diagram 7.1 shows a short- put event athlete throwing an iron ball of mass 3.0 kg.

The work done by the athlete causes the distance of projection of the iron ball is

12.0 m.

Rajah 7.1 menunjukkan seorang atlet acara lontar peluru sedang melontar sebiji

bola besi berjisim 3.0 kg.

Kerja yang dilakukan oleh atlet itu menyebabkan jarak projeksi bola besi itu sejauh

12.0 m

(a) What is the meaning of work?

Apakah maksud kerja?

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

[1 mark]

[1 markah]

(b) The iron ball is thrown by the athlete using the force of 100 N.

Bola besi itu dilontar oleh atlet menggunakan daya 100 N.

(i) Calculate the work done by the athlete to throw the iron ball

Hitung kerja yang dilakukan oleh atlet itu untuk melontar bola besi itu.

[ 2 mark ]

[ 2 markah ]

(ii) State the type of energy gained by the iron ball.

Nyatakan jenis tenaga yang diperoleh oleh bola besi itu.

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

[1 mark]

[1 markah]

(iii) Determine the horizontal velocity of the iron ball.

Tentukan halaju mengufuk bola besi itu.

[ 2 mark ]

[ 2 markah ]

(c) The modifications should be done by the athlete to increase the distance of

projection of the iron ball. State the suitable modifications and give one

reason for the modifications.

Modifikasi perlu dilakukan oleh atlet itu untuk meningkatkan jarak projeksi

bola besi itu. Nyatakan modifikasi yang sesuai dan beri satu sebab untuk

modifikasi itu.

(i) Distance of hand movement:

Jarak pergerakan tangan:

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

Reason:

Sebab:

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

[2 marks]

[2 markah]

(ii) The angle of throwing

Sudut lontaran

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

Reason:

Sebab:

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

[2 marks]

[2 markah]

8. Diagram 8 shows a toaster with specification of 240 V, 1000 W. Rajah 8 menunjukkan sebuah pembakar roti berspesifikasi 240V, 1000W

Diagram 8

Rajah 8 (a) What is meant by the label “240V, 1000 W ” on the toaster?

Apakah yang dimaksudkan label 240 V, 1000W pada pembakar roti itu? .........................................................................................................................

[ 1 mark ] [1 markah]

(b) Based on Diagram 8, calculate Berdasarkan Rajah 8, hitungkan

(i) current flowing through the toaster. arus mengalir melalui pembakar roti

[2 marks] [2 markah]

(ii) resistance of the heater of the toaster? rintangan bagi pemanas pembakar roti tersebut?

[2 marks] [2 markah]

(c) Table 8.1 shows three different types of heater to be used in toaster in Diagram 8 above. Jadual 8.1 menunjukkan tiga jenis pemanas berbeza yang akan digunakan di dalam pembakar roti pada Rajah 8 diatas.

Heater Pemanas

Power supplied to the toaster

Kuasa dibekalkan kepada pembakar

roti

Power produced (heat)

Kuasa dihasilkan (haba)

P 450Js-1 430Js-1

Q 550Js-1 525Js-1

R 600Js-1 575Js-1

Table 8.1 Jadual 8.1

(i) State the effect of thickness of heater to the rate of energy loss in the heater. Nyatakan kesan ketebalan pemanas terhadap kadar kehilangan tenaga pada pemanas. ……………………………………………………………………...........

[1 mark] [1 markah]

(ii) Calculate the efficiency of each heaters P,Q, and R. Hitungkan kecekapan setiap pemanas P,Q dan R.

[4 marks] [4 markah]

(iii) Suggest the most suitable heater to be used in the toaster. Justify your choice.

Cadangkan pemanas yang paling sesuai digunakan di dalam pembakar roti. Berikan alasan bagi pilihan anda itu

………………………………………………………………...................

………………………………………………………………................... [2 marks]

[2 markah]

SECTION B BAHAGIAN B

[20 marks]

[20 markah]

Answer any one question from this section.

Jawab mana-mana satu soalan daripada bahagian ini.

9 Diagram 9.1 and Diagram 9.2 show two identical containers filled with same volume

of liquid X and liquid Y respectively. The density of both liquids is different. Both

liquids spurting out at different horizontal distances.

Rajah 9.1 dan Rajah 9.2 menunjukkan dua bekas yang serupa berisi cecair X dan

cecair Y dengan isipadu yang sama masing-masingnya. Ketumpatan kedua-dua

cecair itu berbeza. Kedua-dua cecair itu memancut keluar pada jarak-jarak

mengufuk yang berbeza.

Diagram 9.1 Diagram 9.2

Rajah 9.1 Rajah 9.2

(a) What is the meaning of density?

Apakah maksud ketumpatan?

[1 mark]

[ 1 markah]

(b) Based on Diagram 9.1 and Diagram 9.2,

Berdasarkan Rajah 9.1 dan Rajah 9.2,

(i) compare the depth of liquids, density of liquids and the horizontal distances

. of liquid spurting out.

bandingkan kedalaman cecair, ketumpatan cecair dan jarak pancutan

mengufuk cecair.

(ii) relate the density of liquid and the horizontal distance of liquid spurting out.

hubungkaitkan ketumpatan cecair dan jarak pancutan mengufuk cecair.

(iii) Deduce a relationship between density and the pressure of liquid.

Deduksikan hubungan antara ketumpatan dan tekanan cecair.

[5 marks]

[ 5 markah]

(c) Diagram 9.3 shows a cross section of a damn.

Rajah 9.3 menunjukkan keratan rentas sebuah empangan.

Diagram 9.3

Rajah 9.3

Compare the thickness of the wall of the damn at lower part and at upper part.

Explain your answer.

Bandingkan ketebalan dinding empangan itu pada bahagian atas dan pada

bahagian bawah. Terangkan jawapan anda.

[4 marks]

[ 4 markah]

(d) Diagram 9.4 shows a scuba diver suit

Rajah 9.4 menunjukkan pakaian seorang penyelam.

Diagram 9.4

Rajah 9.4

Using the appropriate physics concepts, explain the suggestions on the

characteristics and the design of the diver suit so that it is suitable to be worn by

a deep sea scuba diver.

Your answer should include on the following aspects:

Dengan menggunakan konsep fizik yang sesuai, terangkan cadangan bagi ciri-

ciri pakaian penyelam yang sesuai dipakai oleh seorang penyelam laut dalam.

Jawapan anda hendaklah termasuk aspek-aspek berikut:

(i) Type and characteristic of the material

Kekuatan bahan

(ii) Density of material.

Ketumpatan bahan

(iii) Thickness

Ketebalan

(iv) Size of the suit

Ukuran pakaian

[10 marks]

[ 10 markah ]

10. Diagram 10.1 and 10.2 shows an experiment to determine the wavelength of monochromatic light waves.

Diagram 10.1 used a blue light source and Diagram 10.2 used a red light source. Rajah 10.1 dan 10.2 menunjukkan satu eksperimen dwicelah Young untuk

menentukan panjang gelombang cahaya monokromatik. Rajah 10.1 menggunakan sumber cahaya berwarna biru manakala Rajah 10.2

menggunakan sumber cahaya berwarna merah.

Diagram 10.1 Rajah 10.1

Diagram 10.2

Blue fringe

Pinggir biru

Red fringe

Pinggir merah

screen

skrin

Rajah 10.2 The dark and bright fringes are produced after the light passes through the slit. Pemisahan dua celah, a, dan jarak antara dwicelah dengan skrin dalam kedua-dua

rajah, D, dalam kedua-dua rajah adalah malar. Pinggir-pinggir gelap dan cerah dihasilkan setelah cahaya merambat melalui celah.

(a). What is meant by monochromatic light?

Apakah yang dimaksudkan dengan cahaya monokromatik?

[1 mark / markah]

(b) Using diagram 10.1 and diagram 10.2, compare the distance between the

the dark and bright fringe separations, the wavelength and the distance separation between two slit.

Use these observations to state the relationship between the distance between the dark and bright fringe separations with the wavelength and state the physics phenomenon involved.

Menggunakan rajah 10.1 dan rajah 10.2, bandingkan jarak pemisahan antara pinggir-pinggir gelap dan cerah dihasilkan, panjang gelombang dan jarak pemisahan antara dua celah.

Gunakan pemerhatian ini untuk menyatakan hubungan antara jarak pemisahan pinggir-pinggir gelap dan cerah dihasilkan dengan panjang gelombang dan nyatakan fenomena fizik yang terlibat.

[5 marks / markah]

(c) Diagram 10.3 shows ground cabin crew at airport is working. They have to use noise-cancelling headphone to reduce the loud noise from aircraft and also receive instruction from control tower. Rajah 10.3 menunjukkan pekerja di landasan lapangan terbang sedang bekerja. Mereka perlu menggunakan fon kepala batal bunyi untuk mengurangkan bunyi bising dari pesawat dan menerima arahan dari menara kawalan. .

Diagram 10.3 Rajah 10.3

Diagram 10.4 shows the inside noise-canceling headphone. Explain how the inside noise-canceling headphone can reduce the loud sound from surrounding. Rajah 10.4 menunjukkan bahagian dalaman fon kepala batal bunyi. Terangkan bagaimana fon kepala batal bunyi ini dapat mengurangkan bunyi bising daripada persekitaran.

Diagram 10.4 Rajah 10.4

[4 marks / markah]

(d) Diagram 10.5 shows the lecture room at university. Students complain that some improvements need to be made to enhance the sound effect. Rajah 10.5 menunjukkan keadaan bilik kuliah di sebuah universiti. Pelajar menyatakan bahawa beberapa penambahbaikkan perlu dilakukan untuk meningkatkan lagi kualiti kesan bunyi. Using appropriate physics concepts, explain the use of the suitable equipment and furnishing to improve the sound effect during lecture. Menggunakan konsep fizik yang sesuai, terangkan alatan dan perabot yang sesuai untuk meningkatkan lagi kesan bunyi semasa kuliah.

Diagram 10.5 / Rajah 10.5 Your answer should include the following aspects : Jawapan anda hendaklah merangkumi aspek-aspek berikut : (i) position of speakers and microphone Kedudukan pembesar suara dan mikrofon (ii) distance between two speakers jarak antara dua pembesar suara (iii) furniture installed in the lecture room perabot yang dipasang di dalam bilik kuliah (iv) other aspects that can be improve aspek-aspek lain yang boleh ditingkatkan

[10 marks / markah]

Speaker

Pembesar

suara

Microphone

Mikrofon

SECTION C BAHAGIAN C

[20 marks]

[20 markah]

Answer any one question from this section.

Jawab mana-mana satu soalan daripada bahagian ini.

11. Diagram 11.1 shows Mr Ali with mass 70 kg is sitting on the spring horse at a playground. Diagram 11.2 shows Andy with mass 20 kg is sitting on the same spring horse. The spring of the horse sat by Mr Ali is more compressed compared to the spring of the horse sat by Andy. The mass of both spring horses, original length of the spring and the elasticity are same. Rajah 11.1 menunjukkan En Ali yang berjisim 70 kg sedang berada di atas spring

kuda. Rajah 11.2 menunjukkan Andy yang berjisim 20 kg sedang duduk di atas spring

kuda yang sama. Spring kuda mainan yang diduduki En Ali lebih termampat berbanding

dengan spring kuda mainan Andy. Jisim kedua kuda mainan, panjang asal spring dan

kekenyalan spring yang digunakan adalah sama.

(a) What is the meaning elasticity of a material?

Apakah yang dimaksudkan dengan kekenyalan suatu bahan. [1 mark]

[1 markah]

Diagram 11.2 Rajah 11.2

Diagram 11.1 Rajah 11.1

(b) Based on Diagram 11.1 and Diagram 11.2

Berdasarkan Rajah 11.1 dan Rajah 11.2

(i) Compare the mass of load, the extension of the springs and spring

constant.

Bandingkan jisim beban, pemanjangan spring dan pemalar spring. [ 3 marks]

[3 markah]

(ii) relate the forces acting on the springs and the mass. Hubungkait daya yang digunakan ke atas spring dengan jisim

(iii) deduce a relationship between the extension of the spring and the mass. deduksikan hubungan antara pemanjangan spring dengan jisim.

[ 2 marks]

[2 markah]

(c) Explain how the forces between the molecules caused the elasticity in solid state. Terangkan bagaimana daya-daya antara molekul - molekul menyebabkan kekenyalan dalam keadaan pepejal.

[ 4 marks] [4 markah]

(d) Diagram 11.3 shows a spring of suspension system of an ordinary bicycle. Rajah 11.3 menunjukkan spring pada sistem suspensi basikal biasa.

Spring

You are required to give some suggestion to design the spring to enable it to be a racing bicycle and effectively. Using the knowledge and appropriate physics concept, explain your suggestions based on the following aspects: Anda dikehendaki memberi beberapa cadangan yang perlu dilakukan ke atas spring untuk membolehkan ia digunakan sebagai basikal lumba dengan berkesan. Menggunakan pengetahuan dan konsep fizik yang sesuai, terangkan cadangan anda berdasarkan aspek – aspek berikut :- (i) Material used for the spring Bahan yang digunakan untuk spring (ii) The spring constant Pemalar spring (iii) The Length of the spring Panjang spring (iv) The Diameter of the spring Diameter spring (v ) The thicknees of spring wire Ketebalan dawai spring

[10 marks]

[10 markah]

12 Diagram 12.1 shows a transistor circuit. The circuit is used to automatically switch on the bulb at bright day . Rajah 12.1 menunjukkan satu litar bertransistor. Litar ini digunakan sebagai suis outomatik pada mentol di siang hari

Diagram 11.3 Rajah 11.3

(i) Name the type of the transistor. Namakan jenis transistor

[ 1 mark ] [1markah]

(ii) Explain how the bulb is lighted up at bright day Jelaskan bagaimana mentol menyala pada siang hari [4 marks]

[4 markah]

Diagram 12.2 Rajah 12.2

Diagram 12.2 shows a transistor circuit. Resistor M is a variable resistor and resistor N is a fixed resistor. Bulb T will light up when the potential difference across N is at least 1 V.

Rajah 12.2 menunjukkan satu litar transistor. Perintang M adalah perintang boleh ubah manakala perintang N adalah perintang tetap. Mentol T akan menyala apabila beza keupayaan merentasi N adalah sekurang-kurangnya 1 V.

(c) When the potential difference between Y and Z is 1 V, Apabila beza keupayaan antara Y dan Z adalah 1 V, (i) What is the potential difference across X and Z? Berapakah beza keupayaan merentasi X dan Z?

[1 mark] [1 markah]

(ii) What is the potential difference across X and Y? Berapakah beza keupayaan merentasi X dan Y?

Z

T

6 V

M

N

1000

X

Y

[1 mark] [1 markah]

(iii) Calculate the maximum resistance, M that enables the bulb T is light up. Hitungkan rintangan maksimum, M untuk membolehkan mentol T itu menyala.

[3 marks] [3 markah]

Diagram 12.3 shows four electronic circuits R, S, T and U with different specifications. You are required to determine the most suitable electronic circuit to light up three street lights 95 V, 65 W automatically with normal brightness when it is dark.

Rajah 12.3 menunjukkan empat litar elektronik R, S, T dan U dengan spesifikasi yang berbeza. Anda dikehendaki menentukan litar elektronik yang paling sesuai untuk menyalakan ketiga-tiga lampu jalan 95 V, 65 W secara automatik dengan kecerahan normal apabila keadaan gelap.

Circuit Circuit diagrams

R

95 V

6 V

Relay

+

_

S

T

U

Diagram 12.3 Rajah 12.3

95 V

6 V

Relay

+

_

95 V

6 V

Relay

+

_

6 V

Study the specifications of all of the four circuits based on the following aspects: Kaji semua spesifikasi tersebut berdasarkan aspek-aspek berikut:

‐ The position of the light dependent resistor (LDR). Kedudukan perintang peka cahaya (PPC).

‐ The connection of the batteries. Penyambungan bateri.

‐ The arrangement of the street lights circuit. Susunan litar lampu-lampu jalan

‐ The use of a relay switch in the circuit. Penggunaan suis geganti dalam litar.

Determine the most suitable circuit diagram to be chosen and give reasons for your choice. Tentukan gambarajah litar yang paling sesuai dipilih dan berikan sebab bagi pilihan anda.

[10 marks]

END OF QUESTION PAPER KERTAS SOALAN TAMAT

Question Mark Scheme Sub Mark

Total Mark

1 (a)

(b)

(c) (i) (ii)

longitudinal wave reflection change the direction unchanged

1 1 1 1

4

2 (a)

Force per unit area 1

5

(b) Density depth // gravitational acceleration

1 1

(c) P = 1.2 x 900 x 10

= 1.08 x 104 Pa 1 1

(d) Increase / further 1

TOTAL 5 M

3 (a)

(b) (i)

(ii)

(c)

(d)

(e)

Temporary magnet/ magnetic field produce when current flow in the wire Patten and direction are correct S Pin fall down Increase the number of turn/electric current Electric bell/circuit braker/relay

1

1

1

1

1

1

TOTAL 6 M

4 (a)

(b) (i)

(ii)

(c)

concave lens Kanta cekung

M1 – ray from the object parallel to the principal axis, diverge at F sinar dari objek selari dengan paksi utama, mencapah di F M2 - ray from the object directly through the centre of the lens sinar dari objek terus ke tengah kanta M3 - the point of intersection is the point where image is form titik persilangan ialah titik imej terbentuk virtual / upright / smaller maya / tegak / dikecilkan

M1 – 20

11

30

1

v

M2 - v = -12 cm

1

1

1

1

1

1

1

7 M

5 (a)

5 (b) (i)

5 (b) (ii)

Bourdon Gauge Tolok Bourdon

Temperaturer trapped air inside the round flask in diagram 5.2 is higher compare to diagram 5.1 Suhu udara terperangkap di dalam kelalang bulat pada rajah 5.2 lebih tinggi berbanding rajah 5.1 The reading of the measuring instrument X in diagram 5.2 is

1

1

1

F F O I

5 (b) (iii)

5 (c)

5 (d)

5 (e)

higher compare to diagram 5.1 Bacaan alat pengukuran X pada rajah 5.2 lebih tinggi berbanding rajah 5.1 The volume of trapped air inside round flask for diagram 5.1 and diagram 5.2 is same Isipadu udara terperangkap pada rajah 5.1 dan rajah 5.2 adalah sama When temperature of trapped air increase, the reading of measuring instrument X increase. Apabila suhu udara terperangkap meningkat, bacaan alat pengukuran X meningkat. M1 – when the temperature of trapped air Increas, the collision per unit area are increase apabila suhu udara terperangkap meningkat, pelanggaran per unit luas meningkat M2 – the pressure of gas will increase Tekanan udara akan meningkat Pressure Law Hukum Tekanan

1

1

1

1

1

TOTAL 8 M

6 (a)

(b)

(c) (i)

(ii)

(iii)

(d) (i) (ii)

Spontaneous disintegration of unstable nucleus to become

more stable and in the process will emit radioactive rays

Gives a background reading

Rate of decay of Y is bigger than X // vice- versa

Half-life of Y is smaller than X //vice-versa

The percentage remains undecayed after 30 minutes of Y is

bigger than X // vice-versa

Half-life decreases, rate of decay increases

Activity for the substance decreases, rate of decay

1

1

1

1

1

1

1

(e)

increases.

Mark T

1

TOTAL

8 M

7 (a)

(b) (i)

(ii)

(iii)

(c) (i)

(ii)

Work = Force x displacement Work = 100 x 12.0 = 1200 J Kinetic energy 1200 = ½ x 3 x V2 V = 28.28 ms-1 Further // longer Increase the force equal or less than 400 // small angle Increase the forward velocity

1

1 1

1

1 1

1 1

1 1

TOTAL 10 M

8 (a)

(b)(i)

(ii)

(c)(i)

(ii)

When a potential difference of 240V is connected across the heater, it will produce power of 1000J per second. P = VI 1000W = 240VI I = 1000W/240V = 4.16A R = V/I = 240V/4.16A = 57.69 Ω The more the thickness of the wire, the lower the loss of energy from the heater Efficiency = Energy Output / Energy Input x 100% E Filament P = 430 x 100 % 450 = 95.55% E Filament Q = 525 x 100 % 550 = 95.45%

1

1

1

1

1

1

1

1

1

(iii)

E Filament R = 43 x 100 % 50 = 95.83% Heater R has highest efficiency ie 95.83%

1

1

TOTAL 12 M

9 (a)

(b) (i)

(ii)

(iii)

(c)

(d)

Mass per unit volume Depth of liquid in Diagram 9.1 = Diagram 9.2 Density of liquid in Diagram 9.1 > Diagram 9.2 Horizontal distance of liquid spurting out in Diagram 9.1 > Diagram 9.2 The higher the density of liquid, the further the horizontal distance of liquid spurting out The higher the density, the higher the pressure The wall at lower part is thicker than at upper part. Water pressure is directly proportional to depth // Water pressure increase as the depth of water increases Higher force of water is produced at lower part. Thicker wall is to withstand the high force

Modifications Reasons

Neoprene // elastic synthetic

To insulate body / for thermal protection /prevent heat loss

1

1 1 1

1

1

1 1 1 1 1

2

1

5

5

from body

Flexible Can move with the body

Low density material Lighter / small mass

Thick Can withstand high pressure / Protect from sharp object such as coral

Tight fit / same size to body

Reduce water resistance

2 2

2

2

10

TOTAL 20

10 (a)

10 (b)

10 (c)

One colour / one wavelength / one frequency of light Satu warna / satu panjang gelombang / satu frekuensi M1 – the dark and bright fringe separation for diagram 10.2 jarak pemisahan pinggir gelap dan cerah bagi rajah 10.2 adalah lebih jauh berbanding 10.1 M2 – the wavelength of diagram 10.2 is longer than diagram 10.1 panjang gelombang bagi rajah 10.2 adalah lebih panjang berbanding rajah 10.1 M3 – the distance separation between two slit for diagram 10.1 and 10.2 is same jarak pemisahan antara dua celah bagi rajah 10.1 dan 10.2 adalah sama M4 – the distance between dark and bright fringe separation increase, the wavelength increase jarak pemisahan pinggir gelap dan cerah meningkat, panjang gelombang meningkat M5 – interferens interferens M1 – microphone is used to detect noisy sound wave from outside mikrofon digunakan untuk mengesan gelombang bunyi bising dari luaran M2 – sound wave is fed into noise cancelling circuit Gelombang bunyi dihantar ke litar batal bunyi

1

1

1

1

1

1

1

1

1

5

10 (d)

M3 – noise cancelling circuit will produce new sound wave that is 180 degrees out of phase with opposite direction from source. Litar batal bunyi akan menghasilkan gelombang bunyi baharu yang 180 darjah berlainan fasa dan berlawanan arah daripada sumber. M4 – destructive interference cancel the sound. Gelombang memusnah membatalkan bunyi M1 – position of speakers is in front of the microphone Kedudukan pembesar suara adalah di hadapan

mikrofon M2 – to avoid disturbance / to prevent the sound from

speakers being amplified again by the microphones Untuk mengelakkan gangguan / untuk mengelakkan

bunyi daripada pembesar suara dikuatkan semula oleh mikrofon

M3 – distance between two speakers is further to each

other Jarak antara dua pembesar suara adalah berjauhan

antara satu sama lain M4 – so that constructive and destructive interference is

close together until they are hardly noticeable. M5 – covers the wall with soft board Tutup bahagian dinding dengan lapisan lembut M6 – to reduces echoes effect Mengurangkan kesan gema M7 – covers the floor with thick carpet Tutup bahagian lantai dengan karpet tebal M8 – to reduces echoes effect Mengurangkan kesan gema M9 – covers the wall with uneven/ rough surface

1

1

1

1

1

1

1

1

1

1

4

Tutup bahagian dinding dengan permukaan tidak rata / kasar

M10 – to reduces echoes effect Mengurangkan kesan gema

1

1

10

TOTAL 20 M

11 (a)

(b) (i)

(ii)

(iii)

(c)

Elasticity of a material is its property that enables it to return to its original size and shape when the force that was acting on it is removed. Kekenyalan ialah sifat bahan yang boleh kembali ke saiz dan bentuk asal apabila daya yang dikenakan ke atasnya di alihkan. - The mass of load in diagram 9.2 is bigger than 9.1 - Jisim beban dalam rajah 9.2 lebih besar 9.1 - The extension of the springs in diagram 9.2 is longer than 9.1 - Pemanjangan spring dalam rajah 9.2 lebih panjang 9.1 - Spring constant in diagram 9.1 is equal to 9.2 - Pemalar spring dalam rajah 9.1 sama 9.2 The increases the mass, the increases forces acting on the springs / vice versa Semakin bertambah jisim, semakin bertambah daya yang bertindak terhadap spring / sebaliknya The increases the mass, the increases the extension of the springs / vice versa Semakin bertambah jisim, semakin bertambah pemanjangan spring / sebaliknya - stretching causes molecules to be displaced away from each other apabila diregangkan, zarah-zarah berjauhan diantara satu sama lain - attractive intermolecular forces are acting to oppose the stretching daya tarikan antara molekul akan bertindak menentang regangan - when the force is removed

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

12(i) npn 1 1

12(ii) In bright day, the light-dependent resistor(LDR) has a very low

resistance.

Therefore the potential diference across LDR is low and hence

the potential difference across resistor R is high. The base

current flows

and cause a large collector current flows. The bulb lights up

1

1

1

1

Max

5

12(c)(i) V X-Z = 6 V 1 1

Apabila daya dialihkan - attractive intermolecular forces greater than repulsive force so that it can returns to its original form daya tarikan bertambah dan melebihi daya tolakan supaya ia kembali kepada bentuk asalnya

Modifications of the spring

Reason

1. density is low Ketumpatan rendah

small mass // light jisim kecil // ringan

2. Spring constant is high Pemalar spring yang tinggi

Not too stiff and can oscillate with low frequency Tidak terlalu keras dan boleh bergetar dengan frekuensi rendah

3. The length of the Spring is short Panjang spring ialah pendek

- increases spring constant - prevent mass and weight - stiff and stronger

4. The diameter of the spring is low Diameter spring ialah kecil

- increases spring constant - prevent mass and weight - stiff and stronger

5. The thickness of spring wire is big Ketebalan dawai spring ialah besar

- increases spring constant - prevent mass and weight - stiff and stronger

1

2

2

2

2

2

1

TOTAL 20 M

12(c)(ii) V X-Y = 6 -1 = 5 V 1 1

12(c)(iii) V

RR

RV

NM

MM 6

VR

R

M

M 61000

5

5RM+ 5000 = 6RM

RM= 5000 Ω

1

1

1

3

12(d) - LDR is connected at base circuit

- When intensity of light is low / dark, resistance of LDR

increases / so Vbase is large / transistor switched on

- Terminal positive of batteries is connected to collector

- So that the transistor is forward biased

- Bulbs are arranged in parallel circuit

- All bulbs are connected to voltage supply of 95V

- Relay switch is used

- So that the secondary circuit will switch on // So that the

electromagnet will switch on the secondary circuit

- Choose A

- Because LDR is connected at base circuit, terminal positive of

batteries is connected to collector; bulbs are arranged in parallel

circuit and relay switch is used.

1

1

1

1

1

1

1

1

1

1

10

TOTAL 20 M