10 Facts About Voltage source

Voltage source is a two-terminal device which can maintain a fixed voltage.

An ideal voltage source can maintain the fixed voltage independent of the load resistance or the output current.

An ideal voltage source is a two-terminal device that maintains a fixed voltage drop across its terminals.

Conversely, if the voltage across an ideal voltage source is determined by some other voltage or current in a circuit, it is called a dependent or controlled voltage source.

Internal resistance of an ideal voltage source is zero; it is able to supply or absorb any amount of current.

However, the internal resistance of a real voltage source is effectively modeled in linear circuit analysis by combining a non-zero resistance in series with an ideal voltage source .

Conversely, a current Voltage source provides a constant current, as long as the load connected to the Voltage source terminals has sufficiently low impedance.

An ideal current source would provide no energy to a short circuit and approach infinite energy and voltage as the load resistance approaches infinity .

An ideal current Voltage source has an infinite output impedance in parallel with the Voltage source.

Since no ideal sources of either variety exist, any current source can be considered as a voltage source with the same source impedance and vice versa.