PHYSICS 3 TRIAL SPM SBP 7 July 2017 Marking Scheme 1

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 inference_{The 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 materials_{Spring, 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_{, 40}o_{, 50}o_{, and 60}o_.

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