Q.1.
What is a disadvantage of an oven?
Q.2.
Which of the following items use electricity in the home?
Q.3.
Which does not normally rely on electricity?
Q.4.
If a 3 kW kettle is switched on for 3 minutes, when compared to a 2 kW toaster switched on for 5 minutes, which uses more energy?
Q.5.
Another kettle has a power rating of 3 kW of power and transfers 2 kW of that into heat energy to boil water. How efficient is the kettle?
Q.6.
What is an advantage of using a kettle instead of a pan on a gas cooker to boil water?
Q.7.
Which would be safest and most efficient for toasting bread?
Q.8.
Which appliance would work if the electricity was not working in a house?
Q.9.
How much power does a kettle use if it transfers 1,000 joules of energy in 10 seconds?
Q.10.
If an electric stovetop uses 75 W of power in 300 seconds to boil water in a pan, whilst a kettle uses 100 W to boil the same mass of water in 150 seconds, which is the more energy efficient appliance to use for this process?