In electricity, a source is called that element with the ability to produce an inequality of potential between its edges, or to supply an electric current, so that other circuits work. The electrical source is classified into real sources (voltage or current) and ideal sources (dependent or independent).
Ideal sources are used in circuit theory for the study and invention of models that allow analyzing the behavior of electronic components. They can be dependent when the output value is proportional to the voltage on another side of the circuit. This source depends on the voltage or current called "control variable". They are independent when their characteristics are not subject to any other network variable, although they can change over time.
The ideal independent sources are classified as: ideal voltage source, is one that originates a ddp (potential difference) between its terminals constant and independent of the load it supplies. Ideal intensity source is one that provides a constant intensity independent of the load that it feeds.
On the other hand, real sources differ from ideal ones, when the ddp they produce depends on the load to which they are connected. They can be of tension or intensity. Voltage sources are those that produce a ddp between their terminals, constant and independent of the load that it supplies or dependent on the load to which they are connected. The current source is one that provides a permanent intensity independent of the load it supplies or dependent on the load to which they are connected.
