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Fizik Nama :Tingkatan:.

Kertas 3

2009

1 Jam

SEKOLAH MENENGAH SAINS REMBAU

PEPERIKSAAN PERTENGAHAN TAHUN 2012

TINGKATAN 5

FIZIK

Kertas 3

Satu jam tiga puluh minit

DO NOT OPEN THIS BOOKLET UNTIL TOLD TO DO SO

INFORMATION FOR CANDIDATES

1 This question paper consists of two

sections:Section A andSection B

2. Answerallquestions inSection A.Write your answer forSection A in the

spaces provided in the question paper.3. Answerone question fromSection B.

Write your answers forSection B on the

paper provided.

Answer questions inSection B in detail.Answer should be clear and logical.

You may use equations,diagrams,tables,

graphs and other suitable methods to

explain your answer.4 Show your working, it may help you to

get marks

5 You may use a non programmablescientific calculator.

6 The time suggested to answerSection A is 60 minutes andSection B is 30 minutes.

This Question Paper consists of11 printed pages. [See Next Page

SULIT

Section A

[28 marks]

Examiners Code

Section QuestionFull

Marks

Marks

Obtained

A1 16

2 12

B3 12

4 12

Total

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Answerall questions in this section.

1 Abdullah carried out an experiment to study the relationship between the rise in

temperature of water, and the mass of water, m . He measured 50 cm3 of water using

a measuring cylinder. Then he poured the water into a 1000 ml beaker. The

arrangement of the apparatus for the experiment is shown in Diagram 1.1.

Diagram 1.1

He measured the initial temperature of the water and recorded it as t0 = 25 C. Then he

switched on the power supply and stirred the water slowly. After 5 minutes he

switched off the power supply and continued to stir the water slowly until the

maximum temperature was reached as shown in Diagram 1.1.

He repeated the experiment using 60 cm3, 70 cm3, 80 cm3, and 90 cm3ofwater. The

maximum thermometer readings obtained are as shown in Diagram 1.2.

Power supply

Measuringcylinder

2

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Maximum temperature for50 cm3 water.





Diagram 1.2

a) Based on the experiment described above, identify :

i. the manipulated variable

..

[1 mark]

ii. the responding variable

.

[1 mark]

iii. the fixed variable

3

ForExaminers

Use

1(a) (i)

1(a) (ii)

1(a) (iii)

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..

[1 mark]

b) If the density of water is 1 g cm-3, state the equivalent mass of the water, m for

each volume given in Diagram 1.2 and determine the corresponding maximum

temperature, T. Calculate the rise in temperature, using the following formula:

= T - t0

Tabulate your result for m, 1/m , T and for each of the volume, Vof water

given.

[7 marks]

c) Draw a graph ofagainst 1/m on the graph paper provided.

[5 marks]

d) Based on your graph, state the relationship between and m.

[1 mark]

4

1(b)

1(c)

1(d)

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A Graph ofagainst 1/m

5

For

Examiners

Use

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2. A student carries out an experiment to investigate the relationship between resistance,

R, and length of a constantan wire, l. The results of this experiment is shown in the

graph ofR against lin Diagram 2.1.

Diagram 2.1

6

3.0

R/

1.0

2.0

4.0

5.0

6.0

7.0

0 20.0 40.0 60.0 80.0 100.0 l/cm

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a) Based on the graph in Diagram 2.1, state the relationship betweenR and l.

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

b) The resistivity, , is given by the formula = mA , where m is the gradient ofthe graph and A is the cross-sectional area of the wire.

(i) Calculate the gradient, m, of the graph. Show on the graph how you calculate m.

m = ....................................................... [3 marks]

(ii) Determine the value of , if A = 1.5 x 10-5cm2.

[2 marks]

c) (i) Based on the graph in Diagram 2.1, determine the value ofR when l= 16.0

cm. Show on the graph, how you determine the value of R.

[2marks]

7

2(a)

2(b) (i)

2(b) (ii)

2(c) (i)

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(ii) Another identical constantan wire with the same resistance as 2 (c) (i) is

Connected in parallel to the wire. The effective resistance, R, of two constantan

wire in parallel is given by the formulaRRR

11

'

1+= . Calculate R.

[3 marks]

(d) State oneprecaution that can be taken to improve the accuracy of the readings

in the experiment.

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

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

[1 mark]

8

2(c) (ii)

2(d)

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SECTION B

[12 marks]

Answer any one question

3. A boy pushes the boxes along a level walkway as shown in Diagram 3.1. The boy

experiences that the boxes move slowly. When the boy removes one of the boxes as

shown in Diagram 3.2, he experiences that the boxes move faster than before although

the same force was applied.

Diagram 3.1 Diagram 3.2

Based on the information and observation above :

(a) State one suitable inference.

[1 mark]

(b) State one suitable hypothesis.

[1 mark]

(c) With the use of apparatus such as trolleys, ticker timer, ticker tape, elastic cord

and other apparatus, describe an experiment framework to investigate the

hypothesis stated in 3(b).

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In your description, state clearly the following :

i) Aim of the experiment.

ii) Variables in the experiment.

iii) List of apparatus and materials.

iv) Arrangement of the apparatus.

v) The procedure of the experiment which include the method of controlling the

manipulated variable and the method of measuring the responding variable.

vi) The way you would tabulate the data.

vii) The way you would analyze the data.

[ 10 marks ]

4. Water is dripped at a constant rate into two different containers as shown in Diagram 4.1.

The cross-section of the water waves formed from the droplets in the containers are

shown in diagrams below.

10

Water waves

Container

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Diagram 4.1

Based on the information and observation above:

(a) State one suitable inference.

[1 mark](b) State one suitable hypothesis.

[1 mark]

(c) With the use of apparatus such as a ripple tank , a vibrator motor and

other apparatus, describe an experiment framework to investigate the

hypothesis stated in 4 (b).

In your description, state clearly the following;

(i) Aim of the experiment.

(ii) Variables in the experiment.

(iii) List of apparatus and materials.

(iv) Arrangement of the apparatus.

(v) The procedures of the experiment include the method of

controlling the manipulated variable and the method of measuring the

responding variable.

(vi) The way you would tabulate the data.

(vii) The way you would analyses the data.

[10 marks]

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