OR Fig. 5.2 shows the symbol for an electronic circuit component. [Figure 5.2] (a) State the name of the component shown in Fig. 5.2. (b) Fig. 5.3 is the diagram of a circuit that includes this component, a light-dependent resistor (LDR) and a relay. [Figure 5.3] The motor in Fig. 5.3 is part of the pump in a garden fountain. In the dark, the pump does not work. In the morning, the brightness of the light incident on the LDR increases.

1. (a)State the name of the component shown in Fig. 5.2.[1]
2. (b)(i)State what happens to the LDR.[1]
3. (b)(ii)Explain why the motor switches on.[3]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.