p2 f5 2015 - paper 3

PEPERIKSAAN PERTENGAHAN

TAHUN 2015

O Cara ikatan salahO Masalah pengiraanO Unit tidak hafalO Tidak baca soalan

betul-betulO Tidak tanda soalan

pilihanO Skrip jawapan

Bhg. B tidak dinomborkan

O Tiada kemahiran merentas kurikulum – 3Q2

KERTAS 3

28.326.2 29.6

25.230.724.3

2.14.4 6.4

32.123.6

8.5

33.422.9

10.5

Depth of water // d

Pressure // P // Difference in water levels (at column A and column B) // y

Density of water

h/cm lA/cm lB/cm y/cm5.0 28.3 26.2 2.1

10.0 29.6 25.2 4.415.0 30.7 24.3 6.420.0 32.1 23.6 8.525.0 33.4 22.9 10.5

A Heading h, lA, lB, y B Unit h, lA, lB, y C All lA, lB, y consistent to 1 dp

D All y correct

E All y consistent to 1 dp

y is directly proportional to h

Refer to your graph and mark as follows:

√ y axis labeled y and x axis labeled h

√ Unit y-axis (cm) and unit x-axis (cm)

√ even and constant scale for graph

√ √ all points are plotted correctly

√ the best straight line is drawn

√ size of graph is more than half of graph paper

Number of Score

7 5

5 – 6 4

3 – 4 3

2 2

1 1

x is directly proportional to 1/a

Show on the graph

1/a = 3.2 m-1

a = 0.3125 m

0.3125 m

√ [1m]

3.2

0.3125 m

Show the triangle (min: 4 x 4 of cm)

Correct substitution, m

m = 0.157 m2 (with correct unit)

(0,0)

(7,1.1)

Show the triangle (min: 4 x 4 of cm)

√ [1m]

m = (y2-y1 )/(x2-x1) = (1.1–0)/(7-0) = 0.157 m2

λD = axλ(0.01) = 0.0157λ = 15.7 m (with correct unit)

Repeat experiment and take the average reading

Avoid parallax error by placing eyes perpendicular to the scale of reading

Bahagian B : Soalan 3

(a) Jarak objek mempengaruhi ketinggian imej

(b) Semakin jauh jarak objek, semakin rendah ketinggian imej

(c) Untuk mengkaji hubungan antara jarak objek dengan ketinggian imej

P/U Manipulasi: object distance, u

P/U b’gerakbalas: height of image, H

P/U Malar: ketebalan kanta

Bahan/radas: Convex lens, lens holder, metre rule, filament bulb, power supply, screen, (an object (cross wire))

√ [1m]

√ [1m]

√ [1m]

√ [1m]

√ [1m]

√ [1m]

Prosedur

Place an object in front of convex lens, at a distance of, u = 15.0 cm from the object.

Adjust the screen until a sharp image is formed on it. Measure the height of the image, H.Repeat the procedure with values of u = 20.0 cm, 25.0 cm, 30.0 cm, 35.0 cm.

√ [1m]

√ [1m]

√ [1m]

√ [1m]

u / cm H / cm

15.0

20.0

25.0

30.0

35.0

√ [1m]

√ [1m]

Bahagian B : Soalan 4

(a) Panjang dawai mempengaruhi rintangan

(b) Semakin panjang dawai, semakin tinggi rintangan

√ [1m]

(c) Untuk mengkaji hubungan antara panjang dawai dengan rintangan

P/U Manipulasi: length of wire, L P/U b’gerakbalas: resistance, R

P/U Malar: The diameter of wire

Bahan/radas: Constantan wire, dry cells, ammeter, voltmeter, rheostat, metre rule,

√ [1m]

√ [1m]

√ [1m]

√ [1m]

√ [1m]

Prosedur

Connect a constantan wire of length, L = 20.0 cm across terminal X and Y.

Close the switch, adjust the rheostat so that the current flow, I = 0.5 A. Record the voltmeter reading, V. Calculate resistance, R using the formula R = V/I

Repeat the experiment is repeated with constantan wires of length L = 30.0 cm, 40.0 cm, 50.0 cm and 60.0 cm

√ [1m]

√ [1m]

√ [1m]

√ [1m]

√ [1m]

√ [1m]

The length of wire, L/cm

R/Ω

20.0

30.0

40.0

50.0

60.0

Tamat