1.1. Fig. 9.1 and Fig. 9.2 each show an electrical circuit. Each circuit has two lamps connected to an electrical supply.

State the term used to describe each electrical circuit. Write the term under each circuit.

1.2. State two disadvantages of the circuit in Fig. 9.2.

1.3. Redraw the circuit in Fig. 9.1 with switches that will turn lamps X and Y on and off independently of each other.

1.4. Fig. 9.3 shows another circuit.

The lamps can be turned on and off using two different switches S₁ and S₂.

 Complete the table stating when the lamps are on or off. The first one has been done for you.