The graph illustrates how the current in a circuit component varies with the potential difference (p.d.) across it. It includes one straight part and one curved part. As the current rises, what happens to the resistance of the component in these two parts?
- Astraight section: resistance increases; curved section: resistance decreases
- Bstraight section: resistance increases; curved section: resistance increases
- Cstraight section: no change in resistance; curved section: resistance decreases
- Dstraight section: no change in resistance; curved section: resistance increases