Cost Of Electricity Flashcards
1
Q
What does the amount of energy transferred depend on?
A
Power
How amount of time it’s switched on
2
Q
What is the unit of energy
A
J (amount of energy transferred by a 1W appliance in 1s)
3
Q
What is the unit of power
A
Watts (W) or kW
A 5kW appliance transfers 5000J in 1s
4
Q
What is a kilo-watt hour
A
Amount of electrical energy used by a 1kW appliance left on for 1hour
5
Q
What are kWh
A
Kilo-watt hours
Units of energy
