Electrical energy, power and the national grid quiz

This test will test you on your physic skills especially electrical energy, power and the national grid

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1. How do you work out power (in watts,W)

  • energy transferred / time taken
  • time taken / energy transferred
  • power of device / energy transferred
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Other questions in this quiz

2. If a motor transferrs 1000Joules of energy in 10 seconds

  • 100W
  • 10W
  • 10000W

3. How do you work out how much you use on electricity?

  • total cost= number of kWh used * cost per kWh
  • total cost= per kWh / number of Kwh used

4. Is it true that the national grid supplies us with electricity?

  • True
  • False

5. If a games console was using 200 kWh for 2 hours and the cost per kW h was 7p. What is the total cost?

  • £14
  • £28
  • £1.40
  • £2.80

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