Year 9 Circuits Quiz

The hair dryer has 3 loads, name them

What colour is the insulation around the wire connected to the live pin inside the plug?

• Yellow and Green

• Blue

• Brown

• Pink

Why does the hairdryer need an earth wire?

All the switches are shown in the off position.  Which switch or switches have to be ON to make only the fan work?

• Switch 1

• Switch 2

• Switch 2 & 3

• Switch 1 & 2

All the switches are shown in the off position.  Which switch or switches have to be ON to make Heater 2 work?

• Switch 1

• Switch 2 & 3

• Switch 1 & 2

• Switch 1, 2 & 3

The heaters can only be switched on when the fan is also switched on, explain why..