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
(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
The gradient of graph R against L Draw a big triangle (5 X 4 blocks) q = 2.5 – 0.0 Ω
(ii) Decreases 1 1
(c) The position of the eye is perpendicular to the scale of metre rule. 1 1
3
(a) State a suitable inferenceThe extension of spring depends on force 1 1 (b) State a relevant hypothesis The 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 variable Manipulated : force
Responding : extension of spring
1 1
State ONE variable that kept constant
Diameter 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 variable 1. 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 variable
3. 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 times
4. The experiment is repeated by using mass of = 100 g, 150 g, 200 g and
250 g
1
1
1
(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 incidence
1 1
(b) State a relevant hypothesis
Angle of reflection increases as the angle of incidence increases 1 1 (c) (i) State the aim of experiment
To investigate the relationship between angle of reflection and the angle of incidence
1 1
(ii) State the manipulated variable and the responding variable Manipulated variable: angle of incidence
Responding variable : angle of reflection State ONE variable that kept constant
Fixed variable : Angle between plane and mirror // focal length(sila rujuk*)
(iii) Complete list of apparatus and materials
plane mirror, ray box, meter rule, white paper, protractor
1 1
(v) State the method of controlling the manipulated variable 1. 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 variable 3. Record the angle of reflection, r which is measured by using a protractor.
Repeat the experiment at least 4 times
4. Repeat the experiment by using i = 30o, 40o, 50o, and 60o.
1
1 1
3
(vi)
1 1
(viii)
1 1
TOTAL 12
Angle of incidence, i 20o
30o 40o, 50o, 60o. Angle of reflection, r
