Source Transformation

In this topic, another AC analysis included is a Source Transformation. It is when you transform the voltage source to the current source, or via vice versa. To obtain the solution by transformation, use the Ohm's law. And when you obtained a value for example,of a current source from the voltage source, any elements to series like resistors, capacitors or inductors should be placed parallel to the source. 

Considering this circuit example:

You can even set it in a fullscreen. :)

Superposition Theorem

   The strategy used in the superposition theorem is to eliminate all but one source of power within a network at a time, by using series/parallel analysis to determine voltage drops(and/or currents) within the network separately. 

   The values are all "superimposed" on top of each other when once the voltage drops and/or currents have been determined for each power source working separately.

Thevenin's Theorem

Any combination of impedances and sources with two terminals, it can be replaced by a single voltage source e and a single series impedance z. The value of e is an open circuit voltage at the terminals, and z value is divided by the current on which it is with the terminals in a short-circuit. This involves the series/parallel combination.

Considering this circuit example: