Ans Phy P3 Trial Sgor

PROGRAM PENINGKATAN PRESTASI JABATAN PELAJARAN SELANGOR 2008

FIZIK SPM KERTAS 3

PAPER 3 SECTION A Question Marks 1 (a)(i) 1 (ii)

1

(iii)

1

(b)

6

Answer Stating the correct manipulated variable. Incident angle // i Stating the correct responding variable. Refracted angle // r Stating a correct fixed variable. Density of glass block/ refractive index Tabulating results of the experiment 1. Labels i, r, sin i and sin r are shown 2. Correct units for i and r. 3. Minimum 3 correct readings for r. 4. All readings of r are correct 5. All readings of sin i are correct and consistent to 2 or 3 decimal place.

6. All readings of sin r are correct 7. All readings of sin r are consistent to 2 or 3 decimal place i/ o 10 20 30 40 50 (c)

5

(d)

1

TOTAL

16

R/o 6 13 20 25 31

sin i 0.174 0.342 0.500 0.643 0.766

sin r 0.105 0.225 0.342 0.423 0.515

Plotting the sin r against sin i graph A. sin r on the y-axis and sin i on the x-axis. B. No unit stated for and sin r. C. The scales on both axes are regular and not an odd scale. D. 5 points plotted correctly (mark not given if not in table). E. 3 points plotted correctly (mark not given if not in table). F. Line of best fit. G. Graph size a minumum of 5×4 (5 boxes on y-axis, 4 boxes on x-axis). No of ticks Score 7 5 5-6 4 3-4 3 2 2 1 1 Stating the correct relationship Sin r is directly proportional to sin i // sin r α sin i

1

PROGRAM PENINGKATAN PRESTASI JABATAN PELAJARAN SELANGOR 2008

FIZIK SPM KERTAS 3

7 Graph of sin r against sin i

Sin r

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

2

sin i

PROGRAM PENINGKATAN PRESTASI JABATAN PELAJARAN SELANGOR 2008

Question 2 (a)(i) (ii)

Marks

Answer

1

f is directly proportional to 1/x // f α 1/x // f is inversely proportional to x.

1

1. Show on graph with appropriate vertical and/or horizontal line corresponding to 380 Hz 2. 1/x = 0.54 m-1 3. x = 1.852 m

1 1

(b)(i)

3

1. 2. 3.

(ii)

FIZIK SPM KERTAS 3

4

(c)

1

JUMLAH

12

Drawing the gradient triangle Triangle size a minimum of 4 x 3 of 2 cm Substitution (values from student’s triangle) Answer with correct unit 700 Hz m

1. Rearranging the equation v = (fx) a D 2. Substitution of the gradient 3. Substitution of the values D and a v = (700) × 1.0 2.1 3. Answer with correct unit. 333.33 ms-1 When measuring the values of x or D or a, make sure the eyes are perpendicular to the scale on the metre –rule// Carry out the experiment in a large open space (to avoid reflection of sound)// Repeat the experiment to get an average value of x.

3

PROGRAM PENINGKATAN PRESTASI JABATAN PELAJARAN SELANGOR 2008

FIZIK SPM KERTAS 3

SECTION B Question 3

Marks

Answer

(a)

1

(b)

1

(c)(i)

1

(ii)

1

Making the right inference The height of the track(hillock) affects the velocity Building an appropriate hypothesis The greater the height, the larger the velovity. Stating the aim of the experiment To study the relationship between the height and velocity Stating the correct variables Manipulated variable : height (of track), h // number of similar wooden blocks Responding variable : velocity, v

1

Fixed variable : length (of track), l // Mass (of trolley) , m

(iii)

1

(iv)

1

List of appropriate apparatus and material Metre-rule , a.c. power supply Describing set up of the apparatus Ticker tape

Ticker timer Trolley track

a.c. power supply

v)

Note

Stating the procedure of the experiment 1 1 1

vi)

1

viii)

1

Total

12

1. Set up apparatus as shown above. 2. Set the track so that the height of track, h = 15.0 cm. 3. Switch on the power supply and allow the trolley to come down the track. Calculate the velocity, v (of the trolley) from the ticker-tape. 4. Repeat steps 2 and 3 for h = 20.0 cm, 25.0 cm, 30.0 cm and 35.0 cm. 5. Tabulate data. 6. Plot graph of v against h. Tabulating data Show table with h and v as headings Analysing data v

* Unit is not required **This mark may be given at the last line for procedure.

h

4

PROGRAM PENINGKATAN PRESTASI JABATAN PELAJARAN SELANGOR 2008

Question 4

FIZIK SPM KERTAS 3

Marks

Answer

(a)

1

(b)

1

(c)(i)

1

Making the right inference The number of secondary coils affects the brightness of the bulb. Building an appropriate hypothesis The larger the number of turns of the secondary coil , the greater the (induced) current // potential difference (output) Stating the aim of the experiment To study the relationship between the number of turns of the secondary coil and the magnitude of (induced) current // potential difference (Vs) Stating the correct variables Manipulated variable : the number of turns of the secondary coil, Ns Responding variable : (induced) current // potential difference (output)

(ii) 1 1 (iii)

1

(iv)

1

Fixed variable : input voltage // no of turns of the primary coil // size / diametre / thickness of wire of coils. List of appropriate apparatus and material Ammeter / ac voltmeter, ac power supply Describing set up of the apparatus

Ac power supply Soft laminated iron core

OR

Ac power supply (v) 1 1 1 vi) 1 viii) 1

Stating the procedure of the experiment 1.Set up the apparatus as shown, with a 240 V ac current supply with 50 turns on the primary coil. 2. Set the secondary coil so that the number of turns n = 20 3. Swith on the power supply, measure the current, I (with the ammeter) that passes through the secondary coil. 4. Repeat step 2 and 3 for n = 40, 60, 80 and 100 turns. 5. Tabulate the data 6. Plot graph of I against n. Tabulating data Show table with number of turns, n and secondary current, I as headings **This mark may be Analysing data given at the last line I for procedure. n

Total

12

5