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© Oxford University Press 2011
IP1.14.4 Pairs of devices
Different types of electrical devices have advantages and disadvantages. Look at pairs of devices on the following screens
and think of one advantage and one disadvantage for each of them.
© Oxford University Press 2011
IP1.14.4 Pairs of devices
Advantage Disadvantage
Battery-powered
radio
Will run on its own
Batteries will need to be replaced
Wind-up radio
Costs nothing to run
Need to wind it up regularly
© Oxford University Press 2011
IP1.14.4 Pairs of devices
High power electric heaterLow power tubular heater
© Oxford University Press 2011
IP1.14.4 Pairs of devices
Advantage Disadvantage
High power electric heater
Gives off more heat
Not suitable for small spaces
Low power tubular heater
Can be installed in small spaces
Generates only low background heat
© Oxford University Press 2011
IP1.14.4 Pairs of devices
Standard light bulb
Energy saving light bulb
© Oxford University Press 2011
IP1.14.4 Pairs of devices
Advantage Disadvantage
Standard light bulb
Cheaper to buy Not energy efficient
Energy saving light
bulb
Less energy is wasted as heat
More expensive to buy