Electrical Energy Sources

Electrical Energy Sources

Energy sources
Independent voltage sources and independent current sources are the active elements. We have to consider now, these are also known as ideal voltage source and ideal current source respectively.

Ideal Voltage source

An ideal voltage source is one whose voltage is independent of other circuit quantities, the voltage being a function of time only. Specifically it is not a function of the magnitude or direction of the current passing through it. An ideal voltage source may be shown as in fig. shows the case when source voltage is a function of time while fig. show when the voltage is a constant (a direct voltage).
A voltage source is not necessarily a power source. The current through a voltage source is determined by other elements as well as by the voltage source, at the instants of time when the current direction is form –Ve to +ve through the voltage source the energy flows from the voltage sources. A practical voltage source differs from the idealized one defined above in the voltage changes with the current through the source. Any practical source can be approximated by some combination of an ideal voltage source and other circuit elements.

Ideal current source

An ideal current source is a current source whose current is independent of other circuit quantities and is a function of time only specifically it is not a function the voltage across its terminals. A current source may be shown as in fig.
A current source is not necessarily a power since the polarity of the voltage across it is determined by other element as well as by the current source.

Ideal Voltage source characteristic

Ideal voltage source delivers energy at specified voltage V which is independent of current delivers by source.

Ideal current source characteristic

Ideal current source delivers energy at a specified current I which is independent of voltage delivers across the source.

Practical voltage, current sources and their transformation

In a similar manner, a practical current source falls short of the ideal and its output current falls with increase of load resistance (or impudence).  Therefore. Such a source may be approximated as an ideal current source with a shunt resistance (or impedance, to be more general). This shunt impedance then accounts for the fall of output current with increase of load resistance.
Practical voltage and current sources may be diagrammatically represented as in fig. represents practical voltage source while fig. represents a practical current source.
Hence these are electrical energy sources if you will find any incorrect above please comment below in comment box.
If you want to know more about the electrical energy sources you must watch this video.