# Electrical Energy: Definition and Formula

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Electrical energy is energy gotten from electric potential energy or dynamic energy. At the point when utilized freely, “electrical energy” alludes to energy that has been changed over from electric potential energy. This energy is provided by the blend of electric flow and electric potential that is conveyed by an electrical circuit (e.g., given by an electric power utility).

At the point that this electric potential energy has been changed over to another kind of energy, it stops to be electric potential energy. In this manner, all electrical energy is potential energy before it is conveyed to the end-use. When changed over from potential energy, electrical energy can generally be called another sort of energy (heat, light, movement, and so on.).

# What is Electrical Energy? Definition and Formula

Let us try to review the potential difference between two points in an electric field. Is the electrical energy definition related to potential difference? see below:

Suppose potential difference between point A and point B in an electric is v volts.

As per the definition of potential difference we can say, if one positive unit electrical charge that is a body containing one-coulomb positive charge travels from point A to point B, it will do v joules work.

Now instead of one-coulomb charge if q coulomb charge moves from point A to B, it will do vq joules work.

If the time taken by the q coulomb charge to travel from point A to B is t second, then we can write the rate of work done as

Again, we define the work done per second as power. In that case, the term

would be electrical power. In differential form, we can write, electric power

Watt is the unit of power.

Now, if we place a conductor in between A and B, and through which the quantity of electric charge q coulomb is passing. The charge passing through a cross-section of the conductor per unit time (second) is

It is nothing but the electric current i, through the conductor. Now, we can write,

If this current flows through the conductor for a time t, we can say the total work done by the charge is

We define this as electrical energy.

## Electrical Energy Definition

Electrical energy definition is the work done by electric charge. If current i ampere flows through a conductor or through any other conductive element of potential difference v volts across it, for time t second, the electric energy is,

## Electrical Energy Formula

The expression of electric power is

The electrical energy formula is

## Unit of Electrical Energy

Basically, we find the unit of electrical energy is joule. This equals to one watt X one second. Commercially, we also use other units of electrical energy, such as watt-hours, kilo watt hours, megawatt hours etc.

If one watt power is being consumed for 1 hour time, the energy consumed is one watt-hour.