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## PowerPedia:Electrical energy

Lasted edited by Andrew Munsey, updated on June 15, 2016 at 1:43 am.

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Electrical energy refers to several closely related things. It can include the energy stored in an Electric field, the Potential energy of a charged particle in an electric field, and the energy used by Electricity. In these cases, the SI unit of electrical energy is the There was an error working with the wiki: Code. The unit used by many electrical utility companies is the Watt-hour (Wh) or the There was an error working with the wiki: Code (kWh).

#### Electric description

Electrical energy is the amount of Mechanical work that can be done by electricity. Electrical energy is related to the position of an Electric charge in an Electric field. The electric potential energy of a charge Q situated at an There was an error working with the wiki: Code V is equal to the product QV. The same expression gives the Energy transformed when the charge moves through the potential difference V. The energy per unit volume of the Electric field is:

\eta = \frac{1}{2} \epsilon |E|^2

where ? is the There was an error working with the wiki: Code of the medium and E is the electric field vector.

##### Usage note

Frequently, the terms electrical energy and Electric power are used interchangeably. However, in physics, and electrical engineering, "energy" and "power" have different meanings. Power is energy per unit time. In other words, the phrases "flow of power," and "consume a quantity of electric power" are both incorrect and should be changed to "flow of energy" and "consume a quantity of electrical energy."

#### References and external articles

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There was an error working with the wiki: Code

There was an error working with the wiki: Code

There was an error working with the wiki: Code

news://sci.physics

news://alt.engineering.electrical

news://sci.electronics.basics

There was an error working with the wiki: Code, Wikipedia: The Free Encyclopedia. Wikimedia Foundation.

Electrical Energy : Electrical energy is the primary source of energy consumption.

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