The diagram illustrates a section of a circuit that is used to switch street lamps on and off automatically. As evening falls, it becomes dark. Which row indicates how the resistance of the light-dependent resistor (LDR) changes and how the potential difference (p.d.) across it changes?
- Aresistance of LDR decreases, p.d. across LDR decreases
- Bresistance of LDR decreases, p.d. across LDR increases
- Cresistance of LDR increases, p.d. across LDR decreases
- Dresistance of LDR increases, p.d. across LDR increases