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Electrical Power
The rate electrical energy is transferred or converted in a given time period. Amount of energy used in a given time period.
Electrical energy formula
Electrical Energy = power x time (e=pt)
What is electrical energy measured in
Joules (J) or Kilowatt Hours (kWh)
When is electrical energy measured in Joules (J).
when the power is in watts and the time is in seconds.
When is electrical energy measured in Kilowatt Hours (kWh)
When the power is in kilowatts and the time is in hours.
Electrical Power Formula
Electrical Power = voltage x current
Cost of electricity bills formula
Cost = # of kWh x cost of one unit
Whats kWh
Used to measure electrical energy consumption. One Kilowatt hour is equal to the consumption of one kW over a one hour time period.
Whats a kW
Whats a W
Note 
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