13

SET SOALAN 1

7 (a) Diagram 7.1 shows three different objects P, Q and R with the same size are placed in the

beakers containing water. The density of water is 1.0g/cm3.

Rajah 7.1 menunjukkan tiga objek yang berbeza P, Q dan R dengan saiz yang sama diletakkan di dalam bikar

yang mengandungi air. Ketumpatan air 1.0g/cm3.

(i) Based on the observation, state the position of objects P and Q when placed in water. Berdasarkan pemerhatian, nyatakan kedudukan objek P dan Q apabila dimasukkan ke dalam air.

Object P : ............................................................................................................

Object Q : ............................................................................................................

[2 marks]

(ii) Based on the observation, state one inference for the position of object P. Berdasarkan pemerhatian, nyatakan satu inferens bagi kedudukan objek P.

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

[1 mark]

(iii) Based on the observation, classify objects P, Q and R based on their relative density to

the density of water. Berdasarkan pemerhatian, kelaskan objek P, Q dan R berdasarkan ketumpatan bandingan dengan

ketumpatan air.

Relative density of water. Ketumpatan berbanding air

Objects Objek

Less dense than water Kurang tumpat daripada air

Denser than water Lebih tumpat daripada air

[2 marks]

14

(iv) State the relationship between the density of object and their ability to float or sink in

water. Nyatakan hubungan antara ketumpatan objek dan keupayaan mereka untuk terapung atau tenggelam

dalam air.

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

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

[1 mark]

(b) Table 7.2 shows different objects and their densities. Jadual 7.2 menunjukkan bahan berlainan dan ketumpatannya.

Predict what happen to the cork and wood if they are placed in a container containing oil.

The density of oil is 0.75g.cm3. Fill the answer in Table 7.2

Ramalkan apa yang berlaku kepada gabus dan kayu jika diletakkan di dalam bekas yang mengandungi minyak.

Ketumpatan minyak 0.75g.cm3. Isikan jawapan dalam Jadual 7.2.

[2 marks]

8. (a) Diagram 8.1 shows two similar buses with different colour. Rajah 8.1 menunjukkan dua buah bas yang sama dengan warna yang berlainan.

Bus A Bus A

(white in colour) (warna putih)

Bus B Bus B

(black in colour)

(warna hitam)

iagram 8.1

Rajah 8.1

15

(i) Based on your observation in Diagram 8.1, the passenger in which bus will feel more

warm during hot days? Berdasarkan pemerhatian anda di dalam Rajah 8.1. penumpang di dalam bas yang manakah akan merasa

panas pada cuaca panas ?

……………………………………………………………………………………….

[1 mark]

(ii) What inference can be drawn based on the situation in bus A and bus B shown in Diagram

8.1 ? Apakah inferens yang dapat dibuat berdasarkan situasi di dalam bas A dan bas B seperti yang ditunjukkan di

dalam Rajah 8.1 ? ……………………………………………………………………………………….

[1 mark]

(iii) State a hypothesis based on your observation in Diagram 8.1. Nyatakan hipotesis berdasarkan pemerhatian yang ditunjukkan pada Rajah 8.1.

……………………………………………………………………………………….

[1 mark]

(b) A student carried out an experiment to investigate the situation in bus A and bus B. Diagram 8.2

shows an experiment carried out to determine the relationship between the colour of an object and

the absorption of heat. Seorang pelajar menjalankan eksperimen untuk menyiasat situasi yang berlaku di dalam bas A dan B. Rajah 8.2

menunjukkan eksperimen yang dijalankan untuk mengenalpasti hubungan diantara warna bahan dan penyerapan haba.

Diagram 8

Rajah 8

16

(i) Diagram 8.3 shows the final temperature readings taken after 20 minutes. Record the

readings in Table 8.1. Rajah 8.3 menunjukkan bacaan suhu akhir yang diambil selepas 20 minit. Rekodkan bacaan di dalam Jabual

8.1.

Diagram 8.3 Rajah 8.3

Black and dull tin Tin hitam dan pudar

White and shiny tin Tin putih dan berkilat

Initial

temperature (ºC)

Suhu awal (ºC)

Final

temperature (ºC)

Suhu akhir (ºC)

Initial

temperature (ºC)

Suhu awal (ºC)

Final

temperature (ºC)

Suhu akhir (ºC)

30

30

Table 8.1 Jadual 8.1

[2 marks]

17

(ii) Based on the readings in Table 8.1, draw a bar chart to compare final temperature of air in

both tin after 20 minutes. Berdasarkan bacaan pada Jadual 8.1, lukiskan carta bar untuk membandingkan suhu udara bagi kedua-dua tin

selepas 20 minit.

[2 marks]

(iii) State the variables involved in this experiment. Nyatakan pembolehubah yang terlibat di dalam eksperimen ini.

Manipulated variable Pembolehubah dimanipulasikan

Responding variable Pembolehubah yang bergerak balas

Constant variable Pembolehubah dimalarkan

[3 marks]

18

(iv) Based on the bar chart above, state a relationship between the colour of an object and the

absorption of heat. Berdasarkan carta bar di atas, nyatakan hubungan diantara warna den penyerapan haba.

……………………………………………………………………………………….

[1 mark]

(v) Define operationally “the absorption of heat”. Definisikan secara operasi “penyerapan haba”.

……………………………………………………………………………………….

[1 mark]

19

SET SOALAN 2

7. Diagram 7.1 shows the apparatus set-up to study the effect of the exposed surface area

to the rate of evaporation. Rajah 7.1 menunjukkan susunan radas untuk mengkaji kesan luas permukaan terdedah terhadap kadar

sejatan.

Experiment Eksperimen

Time taken for the filter paper

to dry Masa yang diambil untuk kertas turas

mengering

Experiment 1 Eksperimen 1

Stopwatch P Jam randik P

unfolded filter

paper kertas turas yang

tidak dilipat

20

Experiment Eksperimen

Time taken for the filter paper

to dry Masa yang diambil untuk kertas turas

mengering

Experiment 2 Eksperimen 2

Stopwatch Q Jam randik Q

Experiment 3 Eksperimen 3

Stopwatch R Jam randik R

Diagram 7.1 Rajah 7.1

filter paper

folded once kertas turas yang

dilipat satu kali

filter paper

folded twice kertas turas yang

dilipat dua kali

21

(a) (i) Based on the observation in Diagram 7, record the readings of stopwatch

P, Q and R. Berdasarkan pemerhatian dalam Rajah 7, rekod bacaan jam randik P, Q dan R.

Stopwatch Jam randik

Time Masa

P

Q 10 minutes 20 seconds

10 minit 20 saat

R

Table 7.1 Jadual 7.1

[2 marks] [2 markah]

(ii) State one hypothesis that can be made from the experiment. Nyatakan satu hipotesis yang boleh dibuat daripada eksperimen ini.

……………………………………………………………………………………………

……………………………………………………………………………………………

[1 mark] [1 markah]

(iii) State the variable involved in this experiment. Nyatakan pembolehubah yang terlibat dalam eksperimen ini.

Manipulated variable Pembolehubah dimanipulasi

Responding variable Pembolehubah bergerakbalas

Constant variable Pembolehubah dimalarkan

[3 marks] [3 markah]

22

(b) Experiment 1 is repeated by placing the apparatus in front of a rotating table

fan as shown in Diagram 7.2.

Eksperimen 1 diulang dengan meletakkan susunan radas berhadapan dengan

kipas meja yang sedang berputar seperti ditunjukkan dalam Rajah 7.2.

Diagram 7.2

Rajah 7.2

(i) Based on Diagram 7.2, predict the time taken for the filter paper to dry. Berdasarkan Rajah 7.2, ramalkan masa yang diambil untuk kertas turas mengering.

……………………………………………………………………………

[1 mark] [1 markah]

(ii) State an inference for your observation in Diagram 7.2. Nyatakan satu inferen bagi pemerhatian anda dalam Rajah 7.2.

……………………………………………………………………………………………

……………………………………………………………………………………………

[1 mark] [1 markah]

not folded filter paper kertas turas yang tidak

dilipat

23

8. (a) Diagram 8.11 and Diagram 8.12 shows two models of electricity transmission. Rajah 8.11 dan Rajah 8.12 menunjukkan dua model penghantaran tenaga elektrik.

Diagram 8.1 Rajah 8.1

(i) State the difference between the brightness of bulb A and bulb B.

Nyatakan perbezaan antara kecerahan mentol A dan mentol B.

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

[1 mark]

(ii) Write one inference about the brightness of the bulb. Tuliskan satu inferens mengenai kecerahan mentol.

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

[1 mark]

(iii) State one relationship between the amount of output voltage and the brightness

of the bulb. Nyatakan satu hubungan antara jumlah voltan output dengan kecerahan mentol.

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

[1 mark]

bulb B mentol B

36V a.c

12V a.c

bulb A mentol A

step down transformer transformer injak turun

step up transformer transformer injak naik

24

(b) Diagram 8.2 shows the experiment to study the relationship between the input voltage

and the output voltage with the number of turns in the primary coil and the number of

turns in the secondary coil Rajah 8.2 menunjukkan satu eksperimen untuk mengkaji hubungan antara voltan input dan voltan output

dengan bilangan lilitan gegelung primer dan bilangan lilitan gegelung sekunder

Diagram 8.2 Rajah 8.2

Power supply Sumber kuasa

Secondary coil Gegelung sekunder

Primary coil Gegelung primer

C- shape iron core Teras besi C

25

(i) The experiment is repeated three times more by using different number of turns in

the secondary coils that is 20, 30 and 40 turns. Eksperimen diulang sebanyak tiga kali lagi dengan menggunakan bilangan lilitan yang berbeza bagi

gegelung sekunder iaitu20, 30 and 40 lilitan.

Record the output voltage in the space provided. Rekod voltan output di dalam ruang yang telah disediakan.

Number of turns in primary coil = 10 Bilangan lilitan gegelung primer = 10

Number of turns in secondary coil = 20 Bilangan lilitan gegelung sekunder = 20

Output voltage = 2.0 V Voltan output = 2.0V

Number of turns in primary coil = 10 Bilangan lilitan gegelung primer = 10

Number of turns in secondary coil = 30 Bilangan lilitan gegelung sekunder = 30

Output voltage =

Voltan output = …………………V

Number of turns in primary coil = 10 Bilangan lilitan gegelung primer = 10

Number of turns in secondary coil = 40 Bilangan lilitan gegelung sekunder = 40

Output voltage =

Voltan output = …………………V

Number of turns in primary coil = 10 Bilangan lilitan gegelung primer = 10

Number of turns in secondary coil = 10 Bilangan lilitan gegelung sekunder = 10

Output voltage = 1.0 V Voltan output = 1.0V

26

Complete Table 8.1 by recording the output voltage on the respective number of

turns on the secondary coil. Lengkapkan jadual 8.1 dengan merekodkan voltan output mengikut bilangan gegelung sekunder

masing-masing.

Primary coil Gegelung primer

Secondary coil Gegelung sekunder

Number of

turns Bilangan lilitan

Input voltage Voltan input

Number of

turns Bilangan lilitan

Output voltage Voltan output

10 2.0 10 1.0

10 2.0 20 2.0

10 2.0 30

10 2.0 40

Table 8.1 Jadual 8.1

[2 marks]

27

(ii) Based on the data in Table 8.1, draw a line graph of the output voltage against the number of

turns in secondary coils. Berdasarkan data pada Jadual 8.1, lukis graf garis bagi voltan output melawan bilangan lilitan gegelung

sekunder.

(iii) Based on the line graph drawn in 8 (b) (ii), state one relationship between the output

voltage and the number of turns in secondary coil. Berdasarkan graf garis yang dilukis di 8 (b) (ii), nyatakan satu hubungan antara voltan output dengan

bilangan lilitan gegelung sekunder.

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

[1 mark]

28

(iv) State the responding variable in this experiment. Nyatakan pembolehubah yang bergerakbalas dalam eksperimen ini.

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

[1 mark]

(v) State the operational definition for step-up transformer. Nyatakan definisi secara operasi bagi transformer injak naik.

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

[1 mark]

(c) Diagram 8.3 shows an electrical transmission and distribution system which involved four

transformers, P, Q, R and S. Rajah 8.3 menunjukkan sistem penghantaran dan pengagihan elektrik yang melibatkan empat transformer P,

Q, R dan S .

Diagram 8.3 Rajah 8.3

P

Q R

S

Generator

commercial

and

industries komersial

dan

industri

housing area kawasan

perumahan

11kV

132kV

33kV

11kV

11kV

415V

240V

29

Based on the operational definition of step up transformer in c( i), classify transformer P,

Q, R and S in Diagram 8.3 based on type of transformer. Berdasarkan definisi secara operasi bagi transformer injak naik dalam c (i), kelaskan transformer P, Q, R

dan S dalam Rajah 8.3 berdasarkan jenis transformer.

Classification Pengkelasan

Transformer Transformer

Step up transformer Transformer injak naik

Step down transformer Transformer injak turun

[2 marks] [2 markah]