BCTC Industrial Maintenance Technology AMTEC – NOCTI Mechatronic Assessment Practice Test 2026 - Free Mechatronic Practice Questions and Study Guide

Rectifier circuits convert alternating current into pulsating direct current. They use diodes to allow current to pass in only one direction, so each half-cycle of AC is turned into a unidirectional pulse. The result is direct current with ripples, i.e., pulsating DC. A transformer changes AC voltage but doesn’t convert to DC. An inverter turns DC into AC. A filter smooths the pulsating DC but doesn’t perform the conversion itself.