Other questions in this quiz

2. Which formula is correct to work out - No. of Units (kWh) used =

  • Power (in kW) x Time (in seconds)
  • Time (in kW) x Power (in seconds)
  • Power (in kW) x Time (in hours)
  • Power (in J) x Time (in hours)

3. Which is true?

  • kW = J x 10
  • A 5kW appliance transfers 5000 J in 1 second
  • A 50kW appliance transfers 5000 J in 1 second p
  • A 5kW appliance transfers 500 J in 1 second

4. Each unit costs 14p. For how long can a 6kW heater be used for?

  • 10 minutes
  • 1 hours
  • 7 minutes
  • 2 hours

5. Energy is usually measured in what?

  • Power
  • Joules (j)
  • Watts (w)

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