Phy P3 Trialspm Terengganu 08(ans)

SKEMA FIZIK KERTAS 3 PERCUBAAN SPM 2008 SECTION A Question 1 Mark 1

Sectio n 1 (a)(i) 1

Answer State the manipulated variable correctly Density of medium / refractive index

1

(ii 1 )

State the responding variable correctly Refracted angle

1

(iii 1 )

State the constant variable correctly Incident angle

7

(b)

7

Tabulate the results correctly

1 shown in the table give one  sin r

1

Quantities of n, r, sin r and

2 3

State the units of r correctly. give one  The values of r is consistent to one decimal places, and

1 is consistent to one decimal sin r

place sin r is constant to 4 decimal place. give one  4& 5 All 5 values of r are correct -give two  If 3 /4 values are correct give one  If < 3 , 0  6 & 7 All 5 values of

1 are correct- give two  sin r

If 3 /4 values are correct give one  If < 3 , 0  Refractive index, n 1.49 1.52 1.66 2.40 2.91 Full marks : 7

Refracted angle, r/0 22.0 20.0 18.0 13.0 10.0

Sin r

1 sin r

0.3746 0.3420 0.3090 0.2249 0.1736

2.67 .2.92 3.24 4.44 5.76

5

(c)

(b)

5

Draw a complete graph of n against

1 sin r

Tick  based on the following aspects;. 1

 n on the –y axis and

2



3

1 on the –x axis sin r

give 

Both axes are marked with uiniform scale And not odd scale ( 1,2, 4,5,10)

give 

 All five points are plotted corectly (+/- 1 mm/ ½ square box) give  ( Only three points plotted correcly , givei )

4

 Best fitted straight line is drawn give  (berdasarkan keseimbangan bilangan titik di atas dan di bawah garisan i.i sama banyak, /2:1 /3 :2. T . Titik paling jauh dari garisan tidak lebih 0.5 cm) Reject : curve line

5

 Show the minimum size of graph at least 5(vertical) x 4(horizontal) square box (2 cm x 2 cm) (Dikira dari asalan hingga titik akhir jika mula dari asalan. Jika tidak mula dari 0 , tengok titik pertama dan terakhir) Beri  score : Score 5 4 3 2 1

Number of  7 5-6  3-4  2 1 Toatal maks : 5 marks 1

(d)

1

State the correct relationship between n and

1 sin r

Refractive index, n is direcltly propotional to the

16 marks

1 sin r

Question 2 change Section

Mark

(a) (i)

(a) (ii)

Answer

1

State the change correctly Decrease

1 1 1

State the value of θ -shows graph exstrapolation -shows the corresponding arrow -18.5 0C // 18.00C // 19.00C (reject without unit)

3

Calculate the gradient of the graph, h and state the value of h with the acceptable range -Draw a suffiecienly large triangle to calculate the gradient of the graph. -Correct substitution(follow candidate’s triangle) -State value of the gradient with correct unit. The gradient of the graph is14.55 0C kg

3

(a) (iii) 1 1 1

1

Correct substitution to the formula (b) 1 1

(c)

Total

Q gradient 6.1 × 10 4 gradient = 14.55

c=

1

4192.4 J kg-1 0C-1

1

Stir the water gently with the heater to ensure that heat is distributed uniformly to all part of the water.

1

Make sure the insulating jacket is covered all part of the beaker.

3

2 12

SECTION B Question 3 Mark Section Answer 1 3 (a) State a suitable inference The volume of water displacement affects the buoyant force. 1

(b) State relevant hypothesis (with direction) The greater the water displacement the greater the buoyant force.

1

(c) Describe a complete and suitable experimental framework See text book. Experiment of Archimedes Principle

1

State the aim of the experiment

1

To investigate the relationship between the volume of water displacement and the buoyant force. State the manipulated variable and the responding variable mv - the volume of water displacement rv

1

- buoyant force

State the constant variable cv – the density of water

1

List out the important apparatus and materials Ureka can, triple beam balance, 100 ml beaker water.

1

State a functionable arrangement of the apparatus A manometer is connected to thistle funnel with rubber tube

1

State the method of controlling the manipulated variable Full immerse the weight into water ad collect the water flow out from ureka can.

1

State the method of measuring the responding variable Measure the mass of the water collected from ureka can and find the weight. Where weight = mass x acceleration due to gravity.

1

Repeat the experiment at least 4 times with different values Repeat the different volume of the weight.

1

Tabulate the data Records the data . Volume, V/ cm3

Weight, w or buoyant force, F/ N

5.0 10.0 15.0 20.0 25.0 State how data will be analysed (sketch graph/statement)

1

Plot graph volume against buoyant force. Total

12

Question 4 change Section 4 (a)

4 (b)

Mark Answer 1 State a suitable inference • Distance between two consecutive fringe influence by distance of split separation 1

4(c)

State relevant hypothesis (with direction) • If the distances split separation increase , the distance between two consecutive fringes decrease. Describe a complete and suitable experimental framework (10 marks)

4 c (i)

1

4c (ii)

1

•

State the aim of the experiment(M1) To investigate the relationship between distance between two spherical dippers and the distance between two consecutive node lines .

State the manipulated variable and the responding variable(M2) Manipulated variable : distance between two spherical dippers Responding variable : distance between two consecutive node lines

1 State the constant variable ( M3) Constant variable : frequency/wavelength/distance observation line . 4 c(iii)

1

List out the important apparatus and materials (M4) Meter ruler, water, white paper, stroboscope.

4 c(iv)

1

•

State a functionable arrangement of the apparatus (M5)

4 c(v)

1

State the method of controlling the manipulated variable (M6) * set up distance between two spherical dipper as 1.0 cm( or another suitable value)

4 c(vi)

1 State the method of measuring the responding variable (M7) - The waves are freeze by a mechanical stroboscope and sketched on the screen. * measure the distance two consecutive node lines

4c(vii)

1

Reapeat the experiment at least 4 times with different values (M8) * repeat the previous steps by increasing the distance of two spherical dippers to 1.2 cm,1.3 cm 1.4 cm and 1.5 cm

4c(viii)

1

Tabulate the data (M9) Distance between two spherical dippers 1.0 1.2 1.3 1.4 1.5

Distance between two consecutive node lines

1 4c(ix)

TOTAL

State how data will be analysed (sketch graph/statement) (M10) Plot graph distance between two consecutive line against distance of two spherical distance 12