Question 1
- State two factors that affect the resistance of a metallic conductor.
- A 1.5 mm2 conductor is 4500 m long. If the resistivity is 1.72 x 10-8 Ωm, calculate its resistance.
The expected responses were:
(a) Factors that affect the resistance of a metallic conductor
- Temperature
- Length
- Cross-sectional area
- Nature of material
Observation
Many of the candidates that attempted this question did very well with the exception of those that had issues with converting mm2 to m2.