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MODUL • Fizik TINGKATAN 5

Eksperimen Untuk menentukan d.g.e sel kering
Experiment To determine the e.m.f. of a dry cell

Apabila arus, I meningkat, pengurangan tenaga semakin bertambah dan menyebabkan beza keupayaan, V,
Hipotesis menurun. / When the current, I, increases, the energy being dissipated increases and causes the potential difference,
Hypothesis
V, to decrease.

Tujuan Untuk menentukan daya gerak elektrik dan rintangan dalam sel.
Aim To determine the electromotive force and the internal resistance of a cell.

Pemboleh ubah dimanipulasikan / Manipulated variable:
Arus yang mengalir melalui sel, I / Current flowing through the cell, I
Pemboleh ubah Pemboleh ubah bergerak balas / Responding variable:
Variables
Beza keupayaan merentasi sel, V / Potential difference across the cell, V

Pemboleh ubah dimalarkan / Constant variable: Suhu wayar / Temperature of wire
Senarai bahan UNIT 2
dan radas Sel kering, suis, voltmeter, ammeter, reostat dan wayar penyambung
UNIT 2
List of materials Dry cell, switch, voltmeter, ammeter, rheostat and connecting wires
and apparatus

Susunan radas V Reostat
Arrangement of the Rheostat
apparatus
R
A

1 Litar elektrik disediakan seperti dalam rajah.
The electric circuit is set up as shown in diagram.

2 Suis ditutup dan bacaan ammeter, I = 0.2 A dan voltmeter, V dicatatkan dengan melaraskan reostat.

Prosedur The switch is closed and the reading of the ammeter, I = 0.2 A and voltmeter, V is recorded by
Procedure adjusting the rheostat.

3 Eksperimen diulangi dengan nilai I yang berbeza iaitu I = 0.3 A, 0.4 A, 0.5 A, 0.6 A dengan

melaraskan reostat.
The experiment is repeated with different values of I = 0.3 A, 0.4 A, 0.5 A, 0.6 A, by adjusting the rheostat.

Menjadualkan Arus melalui sel / Current flowing through cell, I / A 0.2 0.3 0.4 0.5 0.6
data Beza keupayaan merentasi sel, V / V
Tabulation of data Potential difference across cell, V / V

V / V

Menganalisis data
Analysis of the data

0 I / A

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