The diagram illustrates part of a circuit that is used to turn street lamps on and off automatically. As evening falls, it becomes dark. Which row indicates what happens to the resistance of the light-dependent resistor (LDR) and to the potential difference (p.d.) across it?
- 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