Transferring Electrical Energy Worksheet Page 21
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46(ii)
In one week each kettle is used for a total of 30 minutes.
Which kettle costs the most to use?
...........................................................................................................................
(1)
(iii)
A new ‘express boil’ kettle boils water faster than any other kettle.
Draw a fourth bar on the chart to show the possible power of an ‘express boil’ kettle.
(1)
(c)
Some friends are going on holiday. They want to be able to boil water to make their own
hot drinks. They cannot decide which to take, a travel kettle or a small portable immersion
heater that can be placed in a mug.
Travel Kettle
Immersion heater
•
1 k W element
•
0.4 k W element
•
Holds 1 litre
•
Heates up to 0.5 litres of water
•
Works on 110 V or 230 V
•
Works on 230 V only
•
Washable water filter
•
Small compact size
(i)
Give one advantage of taking the travel kettle.
...........................................................................................................................
...........................................................................................................................
(1)
(ii)
Give one advantage of taking the immersion heater.
...........................................................................................................................
...........................................................................................................................
(1)
(Total 8 marks)
Page 21 of 46
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