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6. Each unit costs 14p. For how long can a 6kW heater be used for?
- 2 hours
- 1 hours
- 10 minutes
- 7 minutes
7. Power is usually measure in what?
- Watts (w) or Kilowatts (kW)
- Energy
- Just watts (w)
- Just joules (j)
8. A KILOWATT-HOUR is the amount of electrical energy is used by a 1kW appliance left on for 1 Hour.
9. Which is true?
- A 50kW appliance transfers 5000 J in 1 second p
- A 5kW appliance transfers 5000 J in 1 second
- A 5kW appliance transfers 500 J in 1 second
- kW = J x 10
10. Energy is usually measured in what?
- Power
- Joules (j)
- Watts (w)