real depth apparent depth

Name : ________________________________ Class : ________

[TOV 2007]

1. A student carries out an experiment to investigate the relationship between real depth, H and apparent depth, h of an object at the lowest part of the water. This experiment begins with puts a white paper contains a fine straight line on it under a tall beaker. A pin is mouted at the retort stand where it can move upward and downward as shown on the Figure 1.1.

Then the student fills water in the tall beaker until the real depth, H is 7.0 cm. The fine straight line watched from the top of water and the pin adjusted up and down from the image of fine straight line. When the both of pin and the image of straight line moving together during the observer moving up and down, the straight line and their image are in the same position. The distance of pin from the water surface measured as apparent depth, h.

This experiment is repeated with fills water in the tall beaker until the real depth are 9.0 cm, 11.0 cm, 13.0 cm and 15.0 cm. The reading of apparent depth, h shown at the Figure 1.2, 1.3, 1.4, 1.5 and 1.6.

FIGURE 1.1

Paper 3 Physics Module (By Mrs Nik Sri Rahayu, SMSHS)

FIGURE 1.2 FIGURE 1.3

FIGURE 1.4 FIGURE 1.5 FIGURE 1.6

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(a) For the experiment described above, identify:

(i) the manipulated variable

………………………………………………………………………………………………………………………………

[1 mark]

(ii) the responding variable

………………………………………………………………………………………………………………………………

[1 mark]

(iii) a constant variable

………………………………………………………………………………………………………………………………

[1 mark]

(b) Base on Figure 1.2, 1.3, 1.4, 1.5 and 1.6 on pages 4 and 5, determine the value of h when H are 7.0 cm , 9.0 cm , 11.0 cm , 13.0 cm and 15.0 cm

Tabulate your results for H and h below. [7 marks]

(c) Plot a graph of H against h. [5 marks]

3


(d) Using your graph, state the relationship between H and h.

………………………………………………………………………………………………………………………………

[1 mark]

QUESTION 9PAHANG TRIAL 2008

1 A student carries out an experiment to investigate the relationship between object distance, u and image distance, v, of a convex lens of focal length, f,. The apparatus is set up as shown in Diagram 1.1

DIAGRAM 1.1

At first, an object is placed at an object distance, u = 20.0 cm. The bulb lights up. The screen is adjusted until a sharp image is formed.

The step is repeated using u = 25.0 cm, 30.0 cm, 35.0 cm and 40.0 cm. The image distance, v is determined by reading directly from the metre rule as shown in Diagram 1.2.

4

Convex lensKanta cembung

Light bulbmentol

Sharp imageImej tajam

screenskrin

Metre rulePembaris meter

Object Objek

v

u

0 cm1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

v

Diagram 1.2

screenskrinConvex lens

Kanta cembung


Image distance, v for different object distance, u is shown in the Diagrams 1.3, 1.4, 1.5 1.6 and 1.7.

5

0 cm1 2 3 4 5 6 7 8 9 10 11 57 58 59 60 62 63 64 65 66 21

Object distance, u = 20.0 cm Image distance, v = ………………….. Diagram 1.3


Kanta cembung

0 cm1 2 3 4 5 6 7 8 9 10 11 34 35 36 37 38 40 41 42 43 21



0 cm1 2 3 4 5 6 7 8 9 27 28 29 30 31 32 33 34 35 36 37 21



Kanta cembung


(a) For the experiment described above, identify:

(i) the manipulated variable

………………………………………………………………………………………………………………………………

[1 mark]

(ii) the responding variable

6

screenskrin

0 cm1 2 3 4 5 6 7 8 9 24 25 26 27 28 29 30 31 32 19 20 21



0 cm1 2 3 4 5 6 7 8 19 20 21 22 23 24 25 26 27 18 19 20 21


screenskrin



………………………………………………………………………………………………………………………………

[1 mark]

(iii) a constant variable

………………………………………………………………………………………………………………………………

[1 mark]

(b) Based on the methods shown in Diagram 1.2, determine the image distance, v, in Diagrams 1.3, 1.4, 1.5, 1.6 and 1.7.

Tabulate your results for u, v, and in the space below. [7 marks]

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(c) On the graph paper, plot a graph of against . [5

marks]

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

………………………………………………………………………………………………………………………………

[1 mark]

[1 mark]ELECTRICITY

QUESTION 10TRIAL SBP 2007

1 A student carries out an experiment to study the relationship between the length of a conductor, ℓ, with the resistance, R. The circuit is connected as shown in Diagram 1.1. Seorang murid menjalankan eksperimen untuk mengkaji hubungan antara panjang suatu konduktor, ℓ, dengan rintangan , R . Sambungan litar .ditunjukkan pada Rajah 1.1

DIAGRAM 1.1

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The length of the constantan wire between P and Q is adjusted so that its length, ℓ = 20.0 cm. The switch is on and the rheostat is adjusted until the current, I, flowing in the circuit is 0.2 A. The potential difference, V, across the wire is recorded.

The procedure is repeated by varying the values of ℓ to be 30.0 cm, 40.0 cm, 50.0 cm and 60.0 cm. For each length of wire used, the rheostat is adjusted so that the current is at a constant value of 0.2 A. The corresponding readings of the voltmeter are shown in Diagram 1.2, 1.3, 1.4, 1.5 and 1.6.

(a) Based on the aim and the procedure of the experiment state the: (i) The manipulated variable

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Diagram 1.6ℓ = 60.0 cm


Diagram 1.5ℓ = 50.0 cmDiagram 1.4

ℓ = 40.0 cm



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

(ii) The responding variable

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

(iii) The constant variable

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

(b) Record the reading of the voltmeter, V in Diagram 1.2, 1.3, 1.4, 1.5 and 1.6 when different length of wires, ℓ are used. In each case, calculate the resistance, R of the wire where:

Tabulate your results for ℓ, V, I and R in the space below.[6 marks]

(c) On the graph paper on page 6, plot a graph of R against ℓ.

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[5 marks]

(d) Based on your graph, state the relationship between R and ℓ.

…………………………………………………………………………………………………………………………………

[1 mark]

(e) State one precaution that should be taken to obtain the accurate readings of V.

…………………………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………………………

[1 mark]

QUESTION 11KEDAH TRIAL 2007

1 A student carries out an experiment to investigate the relationship between the resistance, R, of a wire and the length, L, of the wire.

Diagram 1.1 shows the circuit used in the experiment.

DIAGRAM 1.1

The position of the sliding contact is adjusted until the length of the wire in the circuit is, L = 20.0 cm. The rheostat is adjusted to obtain a suitable current. The current, I and the potential difference, V across the wire are measured by an ammeter and voltmeter respectively. Diagram 1.2 shows the readings of the ammeter and voltmeter.

The procedure is repeated for lengths of the wire, L = 30.0 cm, 40.0 cm, 50.0 cm and 60.0 cm. The corresponding readings of the ammeter and voltmeter are shown in Diagrams 1.3, 1.4, 1.5 and 1.6.

11

A

V

Sliding contact / Sesentuh gelongsor

LWire / Dawai


L = 20.0 cm

DIAGRAM 1.2

L = 30.0 cmDIAGRAM 1.3


12

V

V

V

V

A

A

A

A




(a) Based on the aim and the procedure of the experiment state the:(i) The manipulated variable

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

(ii) The responding variable

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

(iii) The constant variable

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

(b) What is the use of the strip of mirror next to the scale of the voltmeter?

…………………………………………………………………………………………………………………………………

[1 mark]

(c) Based on Diagrams 1.2, 1.3, 1.4, 1.5 and 1.6 on pages 4 and 5, determine the current, I and

potential difference, V for the corresponding lengths of wire, L.

For each value of L, calculate the resistance, R of the wire.

The resistance, R, is calculated using the formula,

Tabulate your results for L, I, V and R in the space below.

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V

A


[5 marks]

(d) On a graph paper, plot a graph of R against L. [5 marks]

(e) Based on your graph, state the relationship between R and L.

……………………………………………………………………………………………………………………………

[1 mark](f) State one precaution that should be taken to obtain accurate readings of V.

……………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………

[1 mark]

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real depth apparent depth

Documents

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graph of h

distance of pin

image of straight line

mark question

value of h

image of fine straight

different object distance