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AQA GCSE Electricity
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page 1
1.The power supplied to a lightbulb is written as 60W. The 'W' stands for
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2. Look at the formula for power on the right. The rearranged formula needed to calculate energy tranferred (E) is ....
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P = E / t | |||||||||||||||||||
3. If 1 kilowatt hour (kWh) costs 10 p, how much would it cost to run a 2kW heater for 4 hours?
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4. A christmas tree uses 5 bulbs, each rated at 100W. At the same cost (1kWh=10p) how much would it cost to leave the tree on overnight for 12 hours?
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5. Look at the electricity meter readings below taken 1 month apart:
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If each unit costs 5p, how much will this customer be charged for this month?
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6. A hair dryer uses 2000J in 5 seconds when on full power. The power used is
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A small village by the sea is considering alternative energy resources to give power to all the homes. They are discussing wind turbines, a small hydroelectric plant, solar panels and wave power. Which of these 4 sources... |
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7. would be the most reliable, providing electricity consistently? |
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8. would have a higher output in summer? |
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9. would have an environmental impact on the village river? |
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10-13. The table below shows the stages of a coal fired power station. What are the missing words?
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14. A non-renewable energy source is one that
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15. Which one of the following energy resources is renewable?
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