3.1 - Electrical appliances

Question 1

What do electrical appliances do?

Answer 1

Transfer electrical energy into whatever form we need at the flick of a switch

Question 2

What are four common electrical appliances and what forms of energy are they designed to produce?

Answer 2

• lamps, to produce light
• electric mixers, to produce kinetic energy
• speakers, to produce sound energy
• televisions, to produce light and sound energy

Question 3

What do many electrical appliances transfer energy by?

Answer 3

Heating. This may be a useful transfer, for example in a kettle, but energy is often wasted

Question 4

What two things should appliances be designed to do?

Answer 4

1) A particular purpose

2) Waste as little energy as possible