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4531

PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA

SEKOLAH MENENGAH

NEGERI KEDAH DARUL AMAN

PEPERIKSAAN PERCUBAAN SPM 2008

PHYSICS

PERATURAN PEMARKAHAN

Peraturan pemarkahan ini mengandungi halaman bercetak

4531

SULIT

4531

Physics

September

2008

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PHYSICS

Paper 3

SECTION A

NO MARKING CRITERIA MARKSUB TOTAL

1(a) (i) State the manipulated variable correctly- Time 1 1

(ii) State the responding variable correctly- Temperature // Increase in temperature 1 1

(iii) State the constant variable correctly- Mass of the water, power of the heater 1 1

(b) State the value of0 within the acceptable range0 = 25

oC 1 1

(c) (i) Record the readings ofcorrectly

All five readings ofcorrect 1 1

(ii) Tabulate the results for t, and correctly

t / s /oC /

oC

20 32 7

40 39 14

60 46 21

80 53 28

100 60 35

Give a tick () based on the following:

A Columns t, and

B Correct units for t, and

C All 5 values ofcorrect

D All 5 values ofcorrect

[Note : 3 or 4 values ofcorrect : ]

E All values ofand

written as whole numbers or

consistent to 0.5oC.

Marks awarded :

Number of Marks

6 5

5 4

3 - 4 3

2 2

1 1

5 5

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(d) Draw a complete graph ofagainst t

Give a tick () based on the following:

A at the y-axis, tat the x-axis

B

Correct units at both axesC Uniform scale at both axes

D 5 points plotted correctly

[Note : 4 points plotted correctly : ]

E Line of best fit is drawn

F Minimum size of graph 5 x 4 big squares

(Big square : 2 cm x 2 cm)

(From the origin to the last point)

Marks awarded :

Number of Marks

7 5

5-6 43-4 3

2 2

1 1

5 5

(e) State the correct relationship between and t

is directly proportional to t 1

16

2(a) (i) State the correct relationship

f x1 //fis inversely proportional to x 1 1

(ii)Determine the value of

x

1correctly

x

1= 0.5 1

Draw the intrapolation line fromx

1= 0.5 to the

given line and from the given line to the faxis 1

State the value offwithin the acceptable range380 Hz 400 Hz 1 3

(iii) Calculate the gradient of the graph, m, and state the

value ofm within the acceptable range-Draw a sufficiently large triangle 1

-Correct substitution (Follow candidates triangle) 1

-State the value/answer with correct unit

770 Hz m to 790 Hz m // 770 m s-1

to 790 m s-1

1 3

(b) State the correct expression

v = D

axf

1 1

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(c) Calculate the value of the velocity and state the

value within the acceptable range-Correct substitution

v =8.2

(770)2.1 to

8.2

(790)2.1 1

-State the value of velocity with correct unit

330 to 339 m s-1

1 2

(d) State two correct precautions- Carry out the experiment in an open space

- Position of the eyes must be align with the scale on the

metre rule

- Place the two speakers closer (so that the value of x is

big enough to be measured)

1

1

1

Max 2 2

12

SECTION B

NO MARKING CRITERIAMARK

SUB TOTAL

3 (a) State a suitable inferenceThe force applied affects the acceleration of an object. 1 1

(b) State a relevant hypothesisThe greater the force, the greater the acceleration 1 1

(c) Describe a complete and suitable experimental

framework(i) State the aim of experiment

To investigate the relationship between the force and

acceleration of a trolley

1

(ii) State the manipulated variable and the respondingvariableManipulated variable : Force

Responding variable : Acceleration

States the constant variableFixed variable : Mass of the trolley

1

1

(iii) List out the important apparatus and materials

Trolley, 5 rubber bands, friction compensated track,

ticker timer, ticker tape, a.c. power supply, ruler

1

(iv) State a functionable arrangement of the apparatus 1

Track

Trolley

Ticker tape timer

Ticker tapePull

Rubber band

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(v) State the method of controlling the manipulated variableThe ticker timer was switched on and the trolley pulled

by 1 rubber band stretched to a certain length.1

(vi) State the method of measuring the responding variableThe acceleration of the trolley was calculated from the

ticker tape obtained1

(vii) State how the procedure is repeated to obtain at least 5sets of resultsSteps 5 and 6 were repeated with 2, 3, 4 and 5 rubber

bands stretched to the same length

1

(viii) Tabulate the data

Force, F/Number of

rubber bands

Acceleration, a / cm s2

1

2

3

45 1

(ix) State how data will be analysedThe graph of acceleration, a against force, Fwas drawn. 1 10

12

4 (a) State a suitable inferenceThe current affects the strength of the magnetic field ofan electromagnet

1 1

(b) State a relevant hypothesisThe greater the current, the stronger the magnetic field

1 1(c)

(i)

Describe a complete and suitable experimentalframeworkState the aim of experimentTo investigate the relationship between the current andthe strength of the magnetic field of an electromagnet.

1(ii) State the manipulated variable and the responding

variableManipulated variable : current

Responding variable : strength of the magnetic field

States the constant variableThe number of turns of the coil

1

1(iii) List out the important apparatus and materials

D.c. power supply, ammeter, rheostat, petri dish andretort stand with clamp, paper clips, soft iron rod,insulated copper wire, and connecting wires. 1

(iv) State a functionable arrangement of the apparatus 1

(v) State the method of controlling the manipulated variable

The current was switched on. The rheostat was adjustedto obtain a current of 0.5 A 1

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(vi) State the method of measuring the responding variableThe number of paper clips, N attracted to the soft ironrod was counted

1(vii) State how the procedure is repeated to obtain at least 5

sets of results

The procedure was repeated for the values of current, I= 1.0 A, 1.5 A, 2.0 A and 2.5 A 1

(viii) Tabulate the data

Current, I/ A Number of pins attracted, N

0.5

1.0

1.5

2.0

2.5

1

(ix) State how data will be analysedA graph ofNagainst I is drawn 1 10

12

END OF MARK SCHEME

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