phy 3 zone a 2009 marking scheme

8/8/2019 Phy 3 Zone a 2009 Marking Scheme

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SPM Trial 2009 Daerah Kuching Zon A Physics 3 Marking Scheme

SPM Trial Examination Zon A Daerah Kuching 2009Physics 3

Marking Scheme

QuestionNo. Answer Marks

1 (a) (i) object distance, u 1

(ii) linear magnification, M 1

(iii) focal length of the lens/ power of the lens 1

(b) ho = 2.0 cm 1

(i)Readings of hi :Diagram 1.3 : 0.8 cmDiagram 1.4 : 1.0 cmDiagram 1.5 : 1.3 cmDiagram 1.6 : 2.0 cmDiagram 1.7 : 4.0 cm

2

(ii)Values of M :Diagram 1.3 : 0.40 Diagram 1.4 : 0.50Diagram 1.5 : 0.65Diagram 1.6 : 1.00Diagram 1.7 : 2.00

1

(iii) Values of M1

:

Diagram 1.3 : 2.50Diagram 1.4 : 2.00

Diagram 1.5 : 1.54Diagram 1.6 : 1.00Diagram 1.7 : 0.50

1

1


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QuestionNo. Answer Marks

(c) 2

(d)Draw a complete graph of

M

1increases linearly with u.

Tick based on the following aspects :

1. ShowM

1on the vertical axis and u on the horizontal axis.

2. State the units of the variables correctly.

3. Both axes are marked with uniform scale.

4. All five points are plotted correctly.

Note : If only three points plotted correctly, award one .

5. Best fit line is drawn.

6. Show the minimum size of graph at least

5 verticalX 4horizontal (2 cm X 2 cm) squares.

(measured from the origin until the furthest point.)

5

2

u / cm hi / cm

h

h

o

i=M

M

1

35.0 0.8 0.40 2.50

30.0 1.0 0.50 2.00

25.0 1.3 0.65 1.54

20.0 2.0 1.00 1.00

15.0 4.0 2.00 0.50


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(e)

M

1increases linearly with u.

1

Total marks 16

3


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4

GraphM

1against u

M

1

0

0.5

1.0

1.5

u/cm

10 15 20 25 30 35

2.0

2.5


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Question

No.

Answer Marks

2 (a) State the relationship between R and lR is directly proportional to l

1

(b)(i) Calculate the gradient of the graph and state the value within the acceptablerange

Show the triangle with an acceptable size ( 4 x 4 squares of 2 cm).

Substitute correctly ( according to the candidates graph)

m =00.100

03.6

State the correct value of the gradient with unit= 0.063 cm-1

1

1

1

(ii) = mA

= 0.063 x 1.5 x 10-5

= 9.375 x 10-7 cm

11

(c) (i) R = 1.0

(Show on the graph how R is obtained)

11

(ii)

0.1

1

0.1

1

'

1+=

R

0.1

2

'

1=

R

R = 0.5

1

11

(d) State ONE correct precaution so as to produce an accurate result of theexperimentThe position of the eye must be perpendicular to the scale when taking

readings to avoid parallax errors.

1

Total 12

5


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Question Answer Marks

3. (a)

(b)

(c) (i)

(ii)

(iii)

(iv)

(v)

State a suitable inferenceAcceleration is influenced by the mass 1

State a relevant hypothesis

When the mass increases, the acceleration decreases. 1

State the aim of experimentTo investigate the relationship between mass and acceleration. 1

State the suitable manipulated variables and responding variable (Quantitythat can be measured)Manipulated variable : mass

Responding variable : acceleration

1

State the constant variableForce applied 1

State the complete list of apparatus and materials

5 Trolleys, ticker timer, ticker tape, a rubber band, a wooden runway, 12 V a.cpower supply.

1

Draw the functional arrangement of the apparatus

[Note : A similar experiment using a pulley and slotted weights as the

constant force is also acceptable.]

Trolley rubber bandTicker

Timer

Ticker tapeFriction compensated runway

Power supply

1

State the method to control the manipulated variable

The apparatus is set up as shown in the diagram.

The ticker-timer is switched on and a trolley is pulled using a rubber band. Theextension of the rubber band is ensured to be of the same length 1

State the method to measure the responding variableAcceleration of the trolley is calculated using the ticker-tape.

a = ( v-u )

t

1

6


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(vi)

(vii)

Repeat the experiment at least 4 times with the values

Procedure 2 and Procedure 3 are repeated using 2, 3, 4 and 5 trolleys.

(Note : Based on SPM standard , at least five manipulated values required.) 1

State how the data tabulated with the title MV and RVMass / number of trolleys acceleration / cm s-2

1

2

3

4

5

1

State how the data is analysed, plot a graph RV against MVacceleration / cm s-2

Mass / number of trolleys

1

Total

12

7


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Question Answer Marks

4. (a)

(b)

(c) (i)

(ii)

(iii)

(iv)

State a suitable inferenceThe separation between two successive bright fringes is influenced by the slit

separation (or distance between the double slits)

//x is influenced by a (Note : student must state what is meant byx and a.)

1

State a relevant hypothesisWhen the slit separation, a , increases, the separation between two successivebright fringes, x, will decrease.

1

State the aim of experimentTo investigate the relationship between slit separation, a, andseparation betweensuccessive bright fringes,x.

1

State the suitable manipulated variables and responding variable (Quantitythat can be measured)Manipulatd variable : slit separation, aResponding variable : separation between successive bright fringes,x.

1

State the constant variableWavelength of light used // distance between double-slit and screen 1

State the complete list of apparatus and materialsLaser light source, screen, Youngs double slit, a few 1-meter rules, two retort

stands with clamps, half-meter rule

1

Draw the functional arrangement of the apparatus

[Note : An interference experiment using water waves in a ripple tank is alsoacceptable.]

1

8

Youngs double slit Interference pattern on the screen

x


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(v)

(vi)

(vii)

State the method to control the manipulated variable

The apparatus is set up as shown in the diagram.

The laser light is switched on and an image of the interference patterns is

observed on the screen.

The slit separation, a,is measured and recorded. The first value ofa = 0.2 mm.

1

State the method to measure the responding variable

The separation between successive bright fringes,x, is measured.

(Note: If 3x is measured, x is obtained by dividing 3x by 3.)Student can also sketch a diagram to illustrate this.

1

Repeat the experiment at least 4 times with the values

The above steps in the procedure are repeated using the slit separation,

a = 0.4 mm, 0.6 mm, 0.8 mm and 1.0 mm.(Note : Based on SPM standard , at least five manipulated values required.)

1

State how the data is tabulated with the title MV and RVSlit separation, a / mm Separation between succesive fringe,

x / mm

0.2

0.4

0.60.8

1.0

1

State how the data is analysed, plot a graph RV against MVsuccessive fringe separation,x / mm

Slit separation, a / mm

1

Total

12

9

O.

NGKALIRAN

O. KAD

NGENAAN

ELAS :AMA

ALON :

phy 3 zone a 2009 marking scheme

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