Description should include the

characteristics of power-supply circuits—basic stages and associated components
basic purpose or function of a power-supply circuit, to include a half, full, and bridge rectifier
operation of power-supply circuits—graphing the voltage pattern at each stage of a power supply’s operation
types of voltage regulators and how they operate
applications of power-supply circuits (e.g., AC power supplies, DC power supplies, switching power supplies associated with computers and digital electronics).

Process/Skill Questions:

How are power supplies classified?
What are the different types of rectifiers?
What are the comparative features of fuses, slow-blow fuses, and circuit breakers?
How does a rectifier circuit work?
What is the difference between a transformer and an inductor?
What is the difference between a voltage regulator and a shunt regulator?
What are the strengths and weaknesses of a series regulator?
What are common examples of products containing over-voltage protection circuits?
What are the implications of ripple frequency?