electrical power

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