Q.1
What is the efficiency of a solar cell if 1000 J of solar energy hits the cell and 200 J are converted into electrical energy?
  • 10%
  • 20%
  • 30%
  • 40%
Q.2
What is electrical energy converted into when a drill is used?
  • Kinetic energy
  • Sound
  • Heat
  • All of the above
Q.3
An old boiler system is replaced with a solar heating system. The old boiler cost £250 per year to run. The new solar heating system costs £0 to run but cost £2,000 to install. How long will it take to start saving money?
  • 4 years
  • 6 years
  • 8 years
  • 10 years
Q.4
Electrical energy in a kettle changes to what type(s) of energy?
  • Heat
  • Sound
  • Light
  • All of the above
Q.5
Electrical energy in a TV changes to what type(s) of energy?
  • Heat
  • Sound
  • Light
  • All of the above
Q.6
An energy saving bulb replaces a 60 W lamp which cost £4.65 each year to run and 20p to buy. The new low energy bulb costs just £2 per year to run and 65p to buy. How long will it take to start saving money on the running costs due to the change?
  • 4 months
  • 5 months
  • 6 months
  • 12 months
Q.7
What would be a good idea to save energy and money?
  • Replace old appliances with energy efficient ones
  • Only leave appliances switched on when being used
  • Use energy saving light bulbs
  • All of the above
Q.8
How could you save money boiling a kettle for one cup of tea?
  • Use only enough water to boil for one cup
  • You cannot
  • Fill kettle to the top
  • Fill kettle half-way
Q.9
Which appliance uses the most energy?
  • Energy saving light bulb
  • Tumble dryer
  • Solar panel
  • TV
Q.10
A heat exchanger can be used to convert which type of wasted energy into a useful source of power?
  • Light
  • Sound
  • Heat
  • Electrical
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