1. PD2 Practice Questions 3

2. (d)Don uses an electric cooker at home. His mother likes to use a gas cooker. His Uncle uses coal for cooking and heating. Write about the advantages and disadvantages of using electricity in the home. [3]

3. (e)There are lots of electrical appliances in Don’s kitchen. Look at the table. appliancepower in kWdouble insulated cooker food mixer kettle microwave toaster 10.0 0.3 3.0 1.0 2.0 no yes no yes no (i) Complete the bar chart below. The first one is done for you. [1] (ii)Each appliance is switched on for 5 minutes. Which one will cost the least to run. Choose from cookerfood mixerkettlemicrowavetoaster [1]

4. (iii)The 10 kW cooker is switched on for 0.5 hours. Calculate how many units of energy are used. [3] (iv)Look at the table of Don’s electrical appliances. Which electrical appliances in Don’s kitchen do not need an earth wire? Choose from cookerfood mixerkettle microwavetoaster [1] (v) The wires in a plug are insulated. They have different colours. What is the colour of the live wire? [1] (vi)All Don’s appliances have a fuse in their plugs. Why are fuses important? [1] (vii)The toaster has a 13A fuse in its plug. Look at the diagram. Explain how the wire fuse works.[3]