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MODUL KECEMERLANGAN AKADEMIK 1

TINGKATAN 5

2017

NEGERI PAHANG

PERATURAN PEMARKAHAN FIZIK

KERTAS 3

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#1 Answer Mark

1 (a) (i) Angle of incidence // i / Sudut tuju// i 1

(ii) Angle of refraction // r / Sudut pantulan // r 1

(iii)

Refractive index (of glass block) // Density (of glass block) Indeks biasan (blok kaca) // ketumpatan (blok kaca)

1

(b)

(i)

(ii)

i / (0) r / (0)

20 13

30 20

40 25

50 30

60 36

All values of r correct - 2 marks 1 – 2 values of r incorrect - 1 mark 3 or more values of r incorrect - 0 mark

Incidence angle,i/(0)

Refractive angle, r/(0)

Sin i Sin r

20 13 0.34 0.22

30 20 0.50 0.34

40 25 0.64 0.42

50 30 0.77 0.50

60 36 0.87 0.59

1. All quantities i, r, sin i and sin r ---------- √ 2. Units for all quantities correct ------------- √ 3. ♦ All values of sin i correct ----------------- √√ ♦ 1 value of sin i incorrect ------------------ √ ♦ > 1 value of sin i incorrect --------------- 0 4. ♦ All values of sin r correct ----------------- √√ ♦ 1 value of sin r incorrect ------------------ √ ♦ > 1 value of sin r incorrect --------------- 0 5. Consistency of decimal point for sin i ---- √ 6. Consistency of decimal point for sin r ---- √

Score (Number of √ ) Mark

8 √ 5

5 – 7 √ 4

3 – 4 √ 3

2 √ 2

1 √ 1

0 0

2 5

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(c) Draw graphs Sin r against sin i

1. Correct title at axis --------- √ 2. Correct units ----------------- √ 3. Even scale ------------------- √ 4. ♦ All points correctly plotted ---------- √√ ♦ 1 point incorrectly plotted -----------√ ♦ > 1 point incorrectly plotted -------- 0 5. Best fit straight line --------------------- √ 6. > 50% graph paper -------------------- √ Score :

Number of Score

7 5

5 – 6 4

3 – 4 3

2 2

1 1

5

(d) sin r is directly proportional to sin i sin r berkadar langsung sin i

1

TOTAL MARKS 16

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Graph 1

0.20 0.40 0.60 0.80 1.00

sin i / 0

0.10

0.20

0.30

0.40

0.50

0.60

Sin r / 0 sin r melawan sin i sin r against sin i

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#2 Answer Mark

2 (a) (i) (ii) (iii)

a is directly proportional to x

1

- Show the horizontal to the y-axis, a = 6.0 cm OR

- Show the vertical line to the x-axis, x

1 = 0.25 cm-1

- x

1 = 0.25 cm-1 √

- x = 4 cm √

- Draw a sufficient large triangle (8 cm x 10 cm) √ - Substitute correctly (according to the student’s graph)

05.0

00.12

√

- State the correct value of the gradient with unit 24.0 cm2 (with correct unit) √

1 3 3

(b) λ =

0.10

0.24 √

= 2.4 cm (with correct unit) √

2

(c) v = (8.0 Hz) (2.4 cm) √ = 19.2 cm s-1 (with correct unit) √

2

(d) 1. eye position must be perpendicular to scale of metre rule Mata mesti berserenjang dengan skala pembaris meter. 2. Memastikan kedalaman air di dalam tangki riak seragam Make sure the depth of water in ripple tank constant

1

TOTAL MARKS 12

√

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# 3 Answer Marks

(a)

(b)

(c)

State a suitable inference / Inferens yang sesuai Acceleration of trolley depens on its force Pecutan troli bergantung pada daya troli

1

Hypothesis / Hipotesis Force increases, acceleration increases Semakin bertambah daya, semakin bertambah pecutan troli

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The aim of experiment / Tujuan eksperimen To investigate the relationship between acceleration and force Mengkaji hubungan antara pecutan dan daya

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State the manipulared variable and responding variable Menyatakan pembolehubah manipulasi dan pembolehubah bergerakbalas Manipulated variable : Force applied by an elastic cord, F Pembolehubah manipulasi : Daya yang dikenakan oleh getah kenyal, F Responding variable : Acceleration of a trolley Pembolehubah bergerakbalas : Pecutan troli

1

State one variable that kept constant Menyatakan pembolehubah yang di malarkan Mass of trolley / Jisim troli

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List of apparatus and materials Senarai radas dan bahan Ticker timer, 12 V a.c, power supply, inclined plane, trolley, ticker tape, elastic band, cellophane tape and metre rule Jangka masa detik, bekalan kuasa 12 V a.c, landasan, troli, pita detik, gelang getah, pita selofan dan pembaris meter.

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Arrangement of apparatus Susunan radas

1

Bekalan kuasa supply

Pita detik

Jangka

masa detik Troli

Landasan terpempas geseran

Gelang getah

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State the method of controlling the manipulated variable Kaedah mengawal pembolehubah dimanipulasi 1. Switch on power supply and a ticker timer. Hidupkan bekalan kuasa dan jangka masa detik. 2. The trolley is pulled down the inclined runway with an elastic cord attached to the hind post of the trolley. Troli ditarik menuruni landasan condong dengan tali kenyal di sambung pada bahagian troli. 3. The elastic cord is strected until the other end is with the front end of the trolley. The length is maintained as the trolley runs down the runway. Tali kenyal ditegangkan dan panjang tali kenyal di kekalkan semasa troli menuruni landasan.

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State the method of measuring the responding variable Kaedah mengukur pembolehubah bergerakbalas 4. The ticker tape obtained is cut into strips of 10 ticks and the acceleration produced by the one unit of force is calculated by

using the formula, a = t

uv .

Pita detik yang diperolehi dipotong dengan setiap jalur mempunyai 10 detik dan pecutan yang dihasilkan oleh satu

unit daya dihitung menggunakan formula, a = t

uv .

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Repeat the experiment at least 4 times Ulangan eksperimen sekurang-kurangnya 4 kali 5. The experiment is repeated with 2, 3, 4 and 5 identical elastic cord. Eksperimen diulangi dengan bilangan 2, 3, 4 dan 5 getah kenyal yang sama

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Penjadualan data

Force / Number of elastic cord Daya / Bilangan getah kenyal

Acceleration Pecutan

1 elastic cord 1 getah kenyal

2 elastic cord 2 getah kenyal

3 elastic cord 3 getah kenyal

4 elastic cord 4 getah kenyal

5 elastic cord 5 getah kenyal

1

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Menganalisis data

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TOTAL MARKS 12

# 4 Answer Marks

(a)

(b)

(c)

State a suitable inference / Inferens yang sesuai Brightness of the bulb depends on temperature//Resistance depends on temperature Kecerahan lampu bergantung kepada suhu//Rintangan bergantung kepada suhu

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Hypothesis / Hipotesis The higher the temperature, the higher the resistance Semakin bertambah suhu, semakin bertambah rintangan

1

The aim of the experiment / Tujuan eksperimen To study the relationship between resistance and temperature Mengkaji hubungan antara rintangan dan suhu

1

State the manipulated variable and responding variable Menyatakan pembolehubah dimanipulasi dan pembolehubah bergerakbalas Manipulated variable : Temperature Pembolehubah dimanipulasi : Suhu Responding variable : Resistance Pembolehubah bergerakbalas : Rintangan

1

State one variable that kept constant Menyatakan pembolehubah yang dimalarkan Length//diameter//resistivity of wire Panjang//diameter//kerintangan wayar

1

Force/Number of elastic cord Daya/Bilangan getah kenyal

Acceleration Pecutan

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List of apparatus and materials Senarai radas dan bahan Voltmeter, Ammeter, termometer, wayar konstantan, air

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Arrangement of apparatus / Susunan radas

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State the method of controlling the manipulated variable Kaedah mengawal pembolehubah dimanipulasi 1. Heat the water until 250C Panaskan air sehingga mencapai suhu 250C

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State the method of measuring the responding variable Kaedah mengawal pemboleubah bergerakbalas 1. Record the reading of ammeter and voltmeter Rekodkan bacaan ammeter dan bacaan voltmeter 2. Calculate the resistance by using formulae R = V/I Hitungkan rintangan dengan menggunakan formula R = V/I

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Repeat the experiment at least 4 times Ulang eksperimen sekurang-kurang 4 kali The experiment is repeated at least 4 times with temperature 300C, 350C, 400C dan 450C Eksperimen diulang sebanyak 4 kali iaitu 300C, 350C, 400C dan 450C

1

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Tabulation of data Penjadualan data

Temperature/Suhu Resistance/Rintangan

25

30

35

40

45

.

1

Analyze the data Menganalisis data

1

TOTAL MARKS 12

END OF MARKING SCHEME

T / 0C