This lesson explores the functions and applications of rectifiers and inverters, key components in converting AC power to DC and vice versa. AC power, commonly supplied by power grids, fluctuates in direction, while DC power flows in a single direction. The rectifier uses components like diodes to allow current to pass through in only. Here, Seth discusses how AC to DC power conversion can be accomplished using half wave and full wave rectifiers. What is an inverter? Inverters ultimately have. A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. Physically, rectifiers take a number.