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CAIE A-Level Physics 9.3.3 I–V Characteristics

Practise sketching and identifying I-V characteristics of metallic conductors, filament lamps and diodes, interpreting gradients, polarity and changing resistance.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • sketch or identify the I–V characteristic of a metallic conductor at constant temperature, a semiconductor diode and a filament lamp
  • interpret gradient, non-linearity and polarity on an I–V graph to distinguish the three components
  • use the shape of an I–V characteristic to infer how resistance changes with current or voltage

9.3.3—The I–V characteristics of a metallic conductor at constant temperature, a question 1

[Maximum number: 1]

The variation of current I with potential difference V for a filament lamp is shown in Fig. 5.1.

Fig. 5.1

Fig. 5.1

The resistance of the filament lamp increases with potential difference.

State how Fig. 5.1 shows this.

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