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PEPERIKSAAN PERCUBAAN

SIJIL PELAJARAN MALAYSIA

2015

NEGERI PAHANG

PERATURAN PEMARKAHAN FIZIK

KERTAS 3

This booklet consists of 10 printed pages

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#1 Answer Mark

1 (a) (i) Distance between 2 coherent sources of sound waves, a 1

(ii) Distance between two consecutive of loud sound, x 1

(iii)

Distance between loudspeakers and where sound is detected // frequencsy of sound waves // wavelength of sound waves

1

(b) (i)

a = 1.0 m x = 15.2 cm a = 1.5 m x = 10.3 cm a = 2.0 m x = 7.3 cm a = 2.5 m x = 5.9 cm a = 3.0 m x = 4.7 cm

a (m) (m-1) x (cm) x (m)

1.0 1.00 15.2 3.04

1.5 0.67 10.3 2.06

2.0 0.50 7.3 1.46

2.5 0.40 5.9 1.18

3.0 0.33 4.7 0.94

. Tabulate data

1. Shows a table which have a, and x.

2. State the correct unit (a : m, : m-1 and x : cm / m)

3. All values x are correct

4. Values of are consistent to 2 decimal point

5. Values of x are consistent to 2 decimal point

All correct 2M 4 correct 1M 3 correct 0M

(accept: ±0.1cm) 1

1

1

1

1 (7)

Accept if student chooses to write either one

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(c) Draw graphs x against

1. √ The responding variable, x at y axis

2. √ The manipulated variable, at x axis

3. √ States the unit of variable correctly

4 √ Both axis with the even and uniform scale

5. √ 5 points correctly plotted

6. √ A smooth best fit straight line

7. √ Minimum size (50% of graph paper)

Score :

Number of Score

7 5

5 – 6 4

3 – 4 3

2 2

1 1

(refer to the next page : Graph 1 OR Graph 2)

5

(d) x is inversely proportional to a OR x is directly proportional

to 1

TOTAL MARKS 16

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Graph 1

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Graph 2

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#2 Answer Mark

2 (a) Shows extrapolation on the graph, intercept y-axis F = 7N

1 1

(b) i Frictional Force 1

ii a increased 1

(c) i Shows on the graph appropiate right triangle (>5x4)

Gradient, m = =

= 3.125 N ms-2 @ 3.125 kg

1 1 1

ii Marked on the graph a = 2.3 ms-2 – 2.8 ms-2

1 1

iii F increases linearly with a 1

(d) Mass 1

(e) 1. The elastic strings are stretched at constant length. 2. The position of the eye perpendicular to the scale of the metre rule when measuring the ticker tape to avoid parallax error/systematic error.

1

TOTAL MARKS 12

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# 3 Answer Marks

(a)

(b)

(c)

State a suitable inference The size of the gas bubble depends on the depth of the water.

1

State a relevant hypothesis The smaller the pressure, the larger is the volume of a (fixed) mass of gas.

1

State the aim of experiment To investigate the relationship between the pressure and volume for a (fixed) mass of gas at a constant temperature.

1

State the suitable manipulated variable and responding variable

Manipulated variable : Volume, V Responding variable : Gas pressure, P

1

State the constant variable Gas temperature,T // mass of gas, m

1

State the complete list of apparatus and materials Glass syringe, a short rubber tube and Bourdon gauge 1

Draw the functional arrangement of the apparatus

1

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State the method to control the manipulated variable The piston of the syringe is adjusted until the volume of air in the syringe is 100 cm3 at atmospheric pressure.

1

State the method to control the responding variable The piston is then pushed in so that the volume of air trapped is 90 cm3. The pressure on the Bourdon gauge is recorded.

1

Repeat the experiment four times with values Repeat the experiment for (enclosed) volume /air trapped in the syringe 80cm3, 70 cm3 and 60 cm3.

1

State how the data tabulated with the title MV and RV

Volume, V/cm3 Pressure, P/Pa

100

90

80

70

60

1

Sketch a graph of H against u // M against u

1

TOTAL MARKS 12

Remarks: Underline – must In brackets – optional

P/Pa

V/cm3

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# 4 Answer Marks

(a)

(b)

(c)

State a suitable inference Resistance depends on // diameter of wire // thickness of wire // cross-section area of wire

1

State a relevant hypothesis The larger the diameter of the wire, the lower the resistance (thickness // cross-section area)

1

State the aim of experiment To investigate the relationship between the diameter of wire and resistance of wire (thickness // cross-section area)

1

State the suitable manipulated variable and responding variable Manipulated variable : diameter of eureka wire (thickness // cross-section area) Responding variable : resistance of the wire

1

State the constant variable Length of wire // temperature of wire // type of wire

1

State the complete list of apparatus and materials Eureka wire (0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm), dry cells, ammeter, voltmeter, rheostat, metre rule, press-switch, connecting wire

1

Draw the functional arrangement of the apparatus

1

State the method to control the manipulated variable, responding Connect a eureka wire (0.1mm) across terminal X and Y.

1

Eureka Wire

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State the method to control the responding variable Close the switch, adjust the rheostat so that the current flow, I = 0.5 A. Record the voltmeter reading, V. Calculate resistance, R using the formula R = V/I

1

Repeat the experiment at least 4 times with values Repeat the experiment is repeated with eureka wire 0.2 mm, 0.3 mm, 0.4 mm and 0.5 mm.

1

State how the data tabulated with the title MV and RV

D / mm R/Ω

0.1

0.2

0.3

0.4

0.5

.

1

Sketch a graph of R against L

1

TOTAL MARKS 12

END OF MARKING SCHEME

D / mm