praktikal paper 3 s

8/13/2019 Praktikal Paper 3 s

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PAPER 3

1. A student carries out an experiment to investigate the relationship between the diameter of

nichrome wire, d, and the resistance,R.

Diagram 1.1 shows the arrangement of the apparatus for the experiment.

Seorang murid menjalankan satu eksperimen untuk mengkaji hubungan antara diameter dawai

nikrom , d, dengan rintangan,R.

Rajah 1.1 menunjukkan susunan radas untuk eksperimen tersebut.

Diagram 1.1

Rajah 1.1

A nichrome wire of diameter, d, 0.15 mm and length of 10 cm is connected. The switch is on and

the rheostat is adjusted until the ammeter reads 0. A. Then the reading on the voltmeter is

recorded.

The procedure is repeated with different d! 0.0 mm, 0.5 mm, 0."0 mm and 0."5 mm. The

actual corresponding readings of voltmeter are shown in Diagrams 1., 1.", 1.#, 1.5 and 1.$.

Suatu dawai nikrom yang berdiameter, d, 0.15 mm dengan panjang 10 cm disambung. Suis

dihidup dan reostat dilaras sehingga bacaan arus pada ammeter menunjukkan 0.2 A.

Ammeter

meter ampere

X

Voltmeter

meter volt

Rheostat

reostat

Switch

suis

Y

Dry cells

Sel kering


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Diagram 1.$

Rajah 1.(

d% 0."5 mm, &%''''..&

(a) *or the experiment described on page , identif+!

%agi eksperimen yang diterangkan di halaman 2, kenal pasti#

(i) The manipulated variable"embolehubah dimanipulasikan

..''''''''''''''''''''''''''...1 mar-

)1 markah*

(ii) The responding variable

"embolehubah bergerak balas

'''''''''''''''''''''''''''...1 mar-

)1 markah*

(iii) The constant variable

"embolehubah dimalarkan


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''''''''''''''''''''''''''...1 mar-

)1 markah*

(b) /ased on Diagrams 1., 1.", 1.#, 1.5 and 1.$ on page " and #!

%erdasarkan Rajah 1.2, 1.$, 1.', 1.5 dan 1.( di halaman $ dan '#

(i) ecord the reading of each potential difference, &, in the spaces provided on

page $.

+atatkan bacaan !oltmeter, , dalam ruang yang disediakan di halaman (.

mar-

)2 markah*

(ii) alculate the values ofR for each of diameter of nichrome wire.

(2iven.0

,R = )

-itungkan nilai&nilai R bagi setiap diameter wayar nikrom.

(Diberi.0

,R = )

mar-

)2 markah*

(iii) Tabulate +our results for

1

d, , andR for all values of d, in the space below.

/adualkan keputusan anda bagi

1

d, , dan R untuk semua nilai d, pada

ruang di bawah


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" mar-

)$ markah*

(c) 3n the graph paper on page 4, plot a graph of against

1

d .

"ada kertas gra di halaman , lukis gra R melawan

1

d .

5 mar-

)5 markah*


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(d) /ased on +our graph in 1(c), state the relationship between and

1

d .

%erdasarkan gra anda di 1c3, nyatakan hubungan antara R and 1

d .

''''''''''''''''''''''''''''''...1 mar-

)1 markah*

NO 1 MARKING SCHEME MARKSU !O!A"

1. (a) (i)

(ii)

(iii)

(b) (i)

(ii)

(iii)

- diameter of nichrome wire / d diameter wayar nikrom / d

- Resistance of nichrome wire / R Rintangan wayar nikrom / R

-Length of nichrome wire / CurrentPanjang wayar nikrom / Arus

-Diagram 1.2 1.! "-Diagram 1.# $.% "-Diagram 1.& $.' "-Diagram 1.! $.& "-Diagram 1.' $.# "Note : Any three readings correct, award 1 mark

1

1

1

2

2

1

1

1

2

2

d / mm R /

$.1! .!$

$.2$ &.!$

$.2! #.$$

$.#$ 2.$$

$.#! 1.!$


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Note : (Any three readings correct, award 1 mark) Quantities of d,1/d, !, " and R shown in the

ta#$e %tate the units of d,1/d, !, " and R correct$y &he 'a$ues of d,1/d, !, " and R are consistent

('a$ue for 1/dmust #e decima$ *$aces)

111

111

(c) Draw a com*+ete gra*h of Ragainst 1/d,ic based on the fo++owing as*ects

. 0how Ron -ais and 1/don -ais 3. 0tate the units of the 4ariab+es correct+ C. 3oth aes are mared with uniform sca+e D. ++ fi4e *oints are *+otted correct+5

6ote 7n+ three *oints *+otted correct+5 award 8. 3est straight +ine is drawn 9. 0how the minimum si:e of gra*h at +east !

& (1$ cm ; cm) s


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( d )

()*+),21

,+21

- Ris direct+ *ro*ortiona+ to 1

d

R #erkadar $angsung dengan

1

d

!

1

(

1

praktikal paper 3 s

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