PENTAKSIRAN DIAGNOSTIK AKADEMIK (FIZIK KERTAS 3)

SBP 2017

Marking Scheme Paper 3 (4531/3)

Question Answer Mark Total Mark

1 (a)(i) Manipulated variable = Temperature // θ 1

(ii) Responding variable = Length of air column // x 1

(iii)Constant variable = Cross sectional area of capillary tube// Mass of air

// atmospheric pressure

1

(b) (i) To produce dry air 1

(ii) x = 2.0, 3.7, 5.2, 6.7, 8.3, 10.0 All correct: 2 marks At least 4 correct: 1 mark

2

(iii) θ / 0C x / cm0 2.020 3.740 5.260 6.780 8.3

100 10.0

1 mark – 3 columns for θ and x 1 mark – correct units for each θ and x 1 mark – all values of θ are consistent 1 d.p

3

(c) Draw the graph of θ against x.A - Label y-axis and x-axis correctly B - States the unit at the axis correctly C - Both axes with the even and uniform scale D - 6 points correctly plotted: - at least 3 points correctly plotted E - a smooth best straight line F - minimum size of the graph is 5 x 4 squares of 2 cm x 2 cm. 7 - 5 marks 6-5 - 4 marks

3-4 - 3 marks2 - 2 marks1 - 1 marks

5

(d) x is linearly increase to θ 1

Question Answer Mark Total Mark(e) The position of the eye must be perpendicular to the scale reading of

ruler/thermometer//Repeat the experiment to get the average value

1

Total 16

Question Answer Mark Total Mark

2 (a)(i) R is directly proportional to L 1 1

(ii)

Extrapolate the graph

Show on the graph when R= 2.75 Ω,

L = 75 cm

1

1

1

3

(iii)

The gradient of graph R against L

Draw a big triangle (5 X 4 blocks)

q = 2.5 – 0.0 Ω 70.0 – 0.0 cm

= 0.0357 Ω cm-1

1

1

1(answer and correct unit)

3

(b)(i)

Use R/L = 0.0357 Ω cm-1

= 0.79 (0.046)2 (0.0357)

= 0.0000597 Ω cm

1

1

1

3

(ii) Decreases 1 1

(c) The position of the eye is perpendicular to the scale of metre rule. 1 1

Total 16

Question Answer Mark Total Mark

3 (a) State a suitable inferenceThe extension of spring depends on force

1 1

(b) State a relevant hypothesisThe greater the force, the greater the extension of the spring

1 1

(c)(i)State the aim of experimentTo investigate the relationship between the force and the extension of the spring

1 1

(ii)

State the manipulated variable and the responding variableManipulated : forceResponding : extension of spring

1 1

State ONE variable that kept constantDiameter of spring, diameter of coil, spring constant

1 1

(iii)Complete list of apparatus and materialsSpring, slotted weight, pin, retort stand, metre rule

1 1

(iv)

Arrangement of apparatus : 1 1

(v) State the method of controlling the manipulated variable1. Initial length of spring, l0 is measured and recorded.2. A slotted weight of mass, m = 50 g is added at the end of the spring.

State the method of measuring the responding variable3. The new length of the spring, l is measured and extension, x is calculated by using formula x = l – l0

Repeat the experiment at least 4 times4. The experiment is repeated by using mass of = 100 g, 150 g, 200 g and 250 g

1

1

1

3

Question Answer Mark Total Mark

(vi)

Tabulation of data:m/g x/cm

1 1

(vii)

Analyze the data. x/cm

m/g

1 1

Total marks 12 12

Question Answer Mark Total Mark

4(a) State a suitable inference

Angle of reflection depends on the angle of incidence1 1

(b) State a relevant hypothesisAngle of reflection increases as the angle of incidence increases

1 1

(c) (i) State the aim of experimentTo investigate the relationship between angle of reflection and the angle of incidence

1 1

(ii) State the manipulated variable and the responding variableManipulated variable: angle of incidenceResponding variable : angle of reflection

State ONE variable that kept constantFixed variable : Angle between plane and mirror // focal length(sila rujuk*).

11

1

3

(iii) Complete list of apparatus and materialsplane mirror, ray box, meter rule, white paper, protractor

1 1

(iv) Arrangement of apparatus : 1 1

Question Answer Mark Total Mark

(v) State the method of controlling the manipulated variable1. The set-up of the apparatus is as shown in figure above.2. Start the experiment with angle of incidence, i = 20o . A ray of light from the ray box is directed to the plane mirror.

State the method of measuring the responding variable3. Record the angle of reflection, r which is measured by using a protractor.

Repeat the experiment at least 4 times4. Repeat the experiment by using i = 30o, 40o, 50o, and 60o.

1

1

1

3

(vi)1 1

Angle of incidence, i20o

30o

40o,50o,60o.

Question Answer Mark Total Mark

(viii)

1 1

TOTAL 12

*catatan

Angle of incidence, i

Angle of reflection, r