✔ 最佳答案
Electrical energy can refer to several closely related things. It can mean:
1)the energy stored in an electric field
2)the potential energy of a charged particle in an electric field
3)the energy provided by electricity
In any of these cases, the SI unit of electrical energy is the joule. The unit used by many electrical utility companies is the watt-hour (Wh) or the kilowatt-hour (kWh).