MRSM Physics P3 Q1 2009

[MRSM 2009 P3 (section A) Q1]1 A student carries out an experiment to investigate the relationship between the object

distance, u, and the image distance, v, for a convex lens. The apparatus set-up for this experiment is shown in Diagram 1.1.

Seorang murid menjalankan satu eksperimen untuk mengkaji hubungan antara jarak objek u, dan jarak imej, v, bagi satu kanta cembung. Susunan radas bagi eksperimen ini ditunjukkan pada Rajah 1.1.

Diagram 1.1 / Rajah 1.1

The student starts the experiment with an object distance of 8.0 cm. The position of the screen is adjusted until a sharp image is formed on the screen. The image distance between the convex lens and the screen, v, is measured and recorded.The experiment is repeated with object distance of 12.0 cm, 16.0 cm, 20.0 cm, 24.0 cm and 28.0 cm. The image distance, v, are shown in Diagram 1.2, 1.3, 1.4, 1.5, 1.6 and 1.7.

Pelajar itu memulakan eksperimen dengan jarak objek 8.0 cm. Kedudukan skrin dilaraskan sehingga imej yang tajam terbentuk. Jarak imej antara kanta cembung dan skrin, v, diukur dan direkodkan.

Eksperimen diulangi dengan jarak objek, 12.0 cm, 16.0 cm, 20.0 cm, 24.0 cm and 28.0 cm. Jarak imej, v, ditunjukkan pada rajah 1.2, 1.3, 1.4, 1.5, 1.6 and 1.7.

1

objectobjek

Light sourceSumber cahaya

To power supplyKe bekalan kuasa

Object distance, uJarak objek, u

image distance, vJarak imej, v

Convex lensKanta cembung

screenskrin

imageimej

u1 =

8.0 cm

v1 = .............................. cm

Diagram 1.2 / Rajah 1.2

u2 =

12.0 cm

v2 = .............................. cm

Diagram 1.3 / Rajah 1.3

2

cm

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

cm

u3 =

16.0 cm

v3 = .............................. cm

Diagram 1.4 / Rajah 1.4

u4 =

20.0 cm

v4 = .............................. cm

Diagram 1.5 / Rajah 1.5

3

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

cm

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

cm

Diagram 1.6 / Rajah 1.6

u5 = 24.0 cm

v5 = .............................. cm

Diagram 1.6 / Rajah 1.6

u6 = 24.0 cm

v6 = .............................. cm

Diagram 1.7 / Rajah 1.7

4

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

cm

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

cm

(a) For the experiment described on page 2, 3, 4, 5, and 6 identify:

Bagi eksperimen yang diterangkan di halaman 2, kenal pasti:

(i) The manipulated variable

Pembolehubah dimanipulasikan

.…......................................................................................................................[1 mark]

(ii) The responding variable

Pembolehubah bergerak balas

.…......................................................................................................................[1 mark]

(iii) The constant variable

Pembolehubah dimalarkan

.…......................................................................................................................[1 mark]

(b) For this part of the question, write your answers in the spaces provided in the corresponding diagrams.

Untuk bahagian soalan ini, tulis jawapan anda dalam ruang yang disediakan dalam rajah-rajah yang sepadan.

Based on Diagrams 1.2, 1.3, 1.4, 1.5, 1.6 and 1.7 on page 3, 4, 5:

Berdasarkan Rajah 1.2, 1.3, 1.4, 1.5, 1.6 dan 1.7 di halaman 3, 4, 5 dan 6:

(i) Record the image distance, u..

Catat jarak imej, v.. [2 marks]

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(ii) Tabulate your results for all values of u, v, and in the space below.

Jadualkan keputusan anda bagi semua nilai u, v, dan dalam ruangan di

bawah. [5 mark]

(d) On the graph paper provided, plot a graph of against .

Pada kertas graf yang disediakan, lukis graf melawan .

[5 marks]

(e) Based on your graph in 1(d), state the relationship between and .

Berdasarkan graf anda di 1(d), nyatakan hubungan antara dan .

.................................................................................................................................... [1 mark]

6

Graph of against

Graf melawan

7