Page 126 - MODUL SPEKTRUM FIZIK SPM

ELECTRICITY / KEELEKTRIKAN

1. (a) State Ohm‟s law.
Nyatakan hukum Ohm.

[1 mark / 1 markah]
(b) Diagram 1.1 shows a graph of current, I, against potential difference, V, of a diode.
Rajah 1.1 menunjukkan graf arus, I, melawan beza keupayaan, V, bagi sebuah diod.

I / mA
8

6

4

2

V / V
-2 -1 0 1 2 3

Diagram 1.1 / Rajah 1.1

(i) State whether the ohm‟s law is obeyed by the diode.
Nyatakan sama ada diod itu mematuhi hukum Ohm.

[1 mark / 1 markah]
(ii) Give a reason why there is no current flowing through the diode when the potential difference
is between 0 V and -2 V.
Beri satu sebab mengapa tiada arus mengalir dalam diod itu apabila beza keupayaan adalah
antara 0 V dan -2 V.

[1 mark / 1 markah]

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