Physics Paper 3

Physics Paper 3

Mid Year Examination 2013

Marking SchemeQuestionMarksMarking Scheme

1(a)(i)1State the manipulated variable correctly ;

Manipulated variable = length of wire, l

(ii)1State the responding variable correctly ;

Responding variable = Resistance of wire, R

(iii)1

State one fixed variable;

Constant variable = Material of wire, cross-sectional area and temperature

(b)1

1

11

1

1

Tabulate ,l, V, I and R correctly in the table.

A Shows a table which have l, V, I and R

B State the correct unit of l /cm, V/V, I /A and R /

C All values of V are correct

D Values of I are correctE Values of R are correctF All values of are consistentl /cm

V / V

I / A

R /

20.0

0.5

0.2

2.5

30.0

0.7

0.2

3.5

40.0

0.9

0.2

4.5

50.0

1.1

0.2

5.5

60.0

1.3

0.2

6.5

(c)5

Draw the graph of R against l. 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 -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

Score

6

5

5

4

3-4

3

2

2

1

1

d1State the correct relationship based on the candidates graph

R is directly propotional to l.

e1State ONE correct precaution so as to produce an accurate result of the experiment

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

Total16 Marks

2(a) (i) (ii)1

3State the relationship between R and l

berkadar langsung/ directly proportionalmemanjangkan garisan graf (extrapolasi) beri 1 markah

menunjukkan garisan pada graf beri 1 markah

Menyatakan nilai sekirat 42.0 N atau 42.0 N (dengan unit yang betul) beri 1 markah.

(b)(i)

(ii)

(iii)

(iv)32

2

1Calculate the gradient of the graph and state the value within the acceptable range

ada menunjukkan segitiga

atau

beri 1 markah

Ada jalan pengiraan beri 1 markah3 N ms-2 atau 3 kg (dengan unit yang betul) beri 1 markah3 x 16 beri 1 markah

= 48 N (dengan unit yang betul) beri 1 markah= 0.5 (3) (2)2 menggunakan rumus beri 1markah= 6 J atau 6 Nm dengan init yang betul beri 1 markahkedudukan mata semasa mengukur (pita detik) mestilah bersetentang degan alat pengukur (mengelakkan parallax error)

Total12 Marks

SECTION B

Question 3

MarksAnswerNote

(a)1Making the right inference

The mass affects the inertia / Jisim mempengaruhi inersia.

(b)1Building an appropriate hypothesis

The bigger the mass, the bigger the inertia / Semakin besar jisim, semakin besar inersia.

(c)(i)1Stating the aim of the experiment

To investigate the relationship between the mass and the period of oscillation.

Untuk menyiasat hubungan antara jisim dan tempoh pengayunan.

(ii)1

1Stating the correct variables

Manipulated variable : Mass /

Pemboleh ubah dimanipulasikan: Jisim

Responding variable: Period of oscillationPembolehubah bergerak balas:Tempoh pengayunan

Constant variable: Type of hack-saw blade.

Pemboleh ubah dimalarkan: Jenis bilah gergaji besi

(iii)1List of appropriate apparatus and materialApparatus : hack-saw blade, G-clamp, stop watch, plasticines with different mass.Radas: bilah gergaji besi, pengapit-G, jam randik, plastisin yang berlainan jisim.

(iv)1

Describing set up of the apparatus

v)1

1

1Stating the procedure of the experiment

(a)The hack-saw is clamped onto the foot of table.

One end of the hack-saw blade is attached with a

10.0 g mass, m.

Bilah gergaji besi diapit pada kaki meja. Hujung

bilah gergaji besi dilekat dengan 10.0 g beban, m.(b)The end loaded with mass is displaced

horizontally. Hujung yang berbeban digerakkan secara ufuk.

(c)The time for 5 oscillations is recorded. Masa untuk

5 ayunan dicatatkan.

(d)The period of 1 oscillation is calculated. Period = Time / 5

Tempoh untuk 1 ayunan dihitung. Tempoh = Masa / 5

(e)The experiments is repeated with mass 20.0 g,

30.0 g, 40.0 g and 50.0 g.

Eksperimen diulang dengan nilai jisim 20.0 g,

30.0 g, 40.0 g dan 50.0 g.

vi)1Mass (g) / Jisim (g)Time taken (s) / Masa diambil (s)Period(s) / Tempoh(s)Tabulating data

viii)1Analysing data

Period(s)

Mass (g) **This mark may be given at the last line for procedure.

Total12

QuestionmarkMarking Scheme

4 (a) 1State a suitable inferenceThe wave length is influence by the depth of water

(b)1States a relevant hypothesis The wave length increases when the depth of water increase.

(c )

1

1

1

1

1

1

1

1

11

Describe a relevant and workable experimental frameworkState the aim of experiment

To study the relationship between the depth of water and the wave length.

State the manipulated variable and the responding variable

Manipulated variable : The depth of water

Responding variable : The wave length.

State ONE variable that kept constantFixed variable : The frequency of waves.

.

Complete list of apparatus and materials

Ripple tank, stroboscope, metre rule, Perspex plate and vibrator motor

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

1.The apparatus is set up as shown in figure.

2.Arrange a ripple tank, and placed a piece of perspex with h = 1.0 cm placed in the centre of the tank.

State the method of measuring the responding variable

The waves are freeze by a mechanical stroboscope and the wave length is measured by using metre rule and recorded.Repeat the experiment at least 2 timesThe experiment is repeated with h = 2.0 cm, 3.0 cm, 4.0 cm, 5.0 cmTabulating of data

DepthThe wave lengthState how data will be analysed

wave length

No of Perspex

TOTAL12 MARKS