SEKTOR SEKOLAH BERASRAMA PENUHBAHAGIAN SEKOLAH

KEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN PERTENGAHAN TAHUN

TINGKATAN 5/2008

FIZIK

PERATURAN PERMARKAHAN

KERTAS 3

1

Marking Scheme Paper 3 Physics Mid Year SBP 2008Question Marks Marking Scheme1 a

(i)1 State the manipulated variable correctly ;

The mass of water(ii) 1 State the responding variable correctly ;

The temparature(iii) 1 State one fixed variable;

Time// density

(b) 1

1

1

1

1

1

State the reading of thermometer at room temparature correctly;26.0 0C

Tabulate ,m, , θ1 and T correctly in the table.

A Shows a table which have m, , θ1 and T

B State the correct unit of m/kg, /kg-1, θ1 /0C and T /0C

C All values of θ1 are correct and consistent 1 d.p.

D Values of are correct and consistent 1/2 d.p.

E Values of T are correct and consistent 1 d.p.

Mass of water, m, kg /kg-1

θ1 /0C T /0C

0.2 5.00 33.0 7.00.4 2.50 29.9 3.90.6 1.70 28.2 2.20.8 1.25 27.8 1.81.0 1.00 27.4 1.4

(c)

Draw the graph of T against .

A - Label y-axis and x-axis correctly

2

5

B - States the unit at the axis correctlyC - Both axes with the even and uniform scale:

D -5 points correctly plotted:

E - a smooth best straight line

F - minimum size of the graph is 5 x 4

Squares of 2 x 2 cm:

Number of √ Score6 55 4

3-4 32 21 1

d 1 State the correct relationship based on the candidate’s graph

T is directly propotional to //

linearly increase e 1 State ONE correct precaution so as to produce an

accurate result of the experiment

The position of the eye perpendicular to the scale when takes the reading to avoid errors due to parallax/systematic error

Total 16 Marks

3

Question Marks Marking scheme Note2 (a) 1

State the relationship between T 2 and m correctlyT2 is directly proportional to m

(b)(i) 1

1

Show horizontal line parallel to the axis with the m axis

T2 = 0.30T = //0.55 s.

(b) (ii) 11

Show extrapolation line62 g

(c) (i)

1

1

1

Calculate the gradient of the graph and state the value within the acceptable range

Show the triangle with an acceptable size ( 4 x 4 squares of 2 cm) Substitute correctly ( according to the candidate’s graph)

m =

State the correct value of the gradient with unit = 0.012 s2g-1

(c) (ii)

1

1

1

State k =

Substitute the gradient from b (i) correctly

=

State the correct answer with unit k = 3287.5 gs-2

c

1

State ONE correct precaution so as to produce an accurate result of the experiment

The position of the eye perpendicular to the scale when takes the reading to avoid errors due to parallax/systematic error

Total 12 marks

4

SECTION B

3 (a)

1 State a suitable inferenceThe pressure of liquid is depends on its density.

(b) 1 State a relevant hypothesis The pressure of liquid increases as its density increases.

(c) 1 State the aim of experiment To investigate the relationship between the pressure and its density.

1 State the manipulated variable and the responding variable

Manipulated : Density // ρResponding : The pressure of liquid

1 State ONE variable that kept constantThe depth of liquid/ /Volume of water

1 Complete list of apparatus and materialsBeaker, thistle funnel, manometer, metre rule and salt

1 Arrangement of apparatus :

1

11

State the method of controlling the manipulated variable1. Apparatus is set as shown in the above figure.2. 20 g of salt is dissolved in 100 ml of water.3. The thistle funnel is lowered into the water at constant h.

State the method of measuring the responding variable4. The value of y is measured by using metre rule.

Repeat the experiment at least 4 times5. The experiment is repeated using 30g, 40g, 50g and 60g

1 Tabulation of data:Mass of salt/Density Pressure / y

5

1

Total marks12

Analyse the data . Pressure/y

Mass of salt/Density

6

Question mark Marking Scheme4 (a) 1 State a suitable inference

An electric current depend on the diameter of wire (b) 1 States a relevant hypothesis

When the diameter of wire increases, the electric current also increases.

(c )

1

1

1

1

1

Describe a relevant and workable experimental framework

State the aim of experimentTo study the relationship between the electric current and the diameter of wireState the manipulated variable and the responding variable

Manipulated variable : The diameter of wireResponding variable : The electric current

State ONE variable that kept constant

Fixed variable : The length of wire

Complete list of apparatus and materialsConstantan of varying diameters(s.w.g 26,s.w.g 28, s.w.g.30, s.w.g 32 and s.w.g 34), dry cells, and ammeter

Note: A complete apparatus and materials means, with the apparatus and materials a set of data ( manipulated and

responding variables) can be obtained from the experiment

State the workable arrangement of the apparatus

State the method of controlling the manipulated variable

7

Total

1

1

1

1

1

1

12 marks

1. The apparatus is set up as shown in figure. 2. A constantan wire s.w.g 26 is connected across terminal X and Y

State the method of measuring the responding variable

The switch is closed and the electric current, I is recorded by using ammeter.

Repeat the experiment at least 4 times

The experiment is repeated with constantan wires s.w.g 28, s.w.g 30, s.w.g 32 and s.w.g 34.Tabulating of data

The Diameter of wire

The electric current, I

State how data will be analysed

I

Diameter of wire

8