This Listing is JUST for Section 4: The x-ray Circuit System. It includes information on AC/DC Circuits, Transformers, Rectification, Phase/Pulse/Frequency, Voltage Ripple and Need to Know Numbers, Primary/Secondary/Filament Circuits. *We provide individual section study guides for sale in our shop or our Full Complete study guide developed for multiple learning types. *Our goal is to provide current students the assistance they need to facilitate learning throughout their program and provide recent grads EVERYTHING THEY NEED IN ONE PLACE to successfully study for their National Registry Exam. Contents are in line with the current 2022 National Registry Content Specifications and uses similar language/terms. *Our Complete study guide is broken down into 23 easy to manage sections to reduce students feeling overwhelmed. *The Table of Contents provides the suggested flow of study to build on previous knowledge for optimal success. *Positioning Guides are in the making per 2022 Content Specifications broken into 5 sections (2 of 5 complete- keep checking for new content) ֍Check out what students and teachers are saying about our material in our reviews and on FB ֍Our Complete Full Study Guide (all 23 sections) Can be found here: https://www.etsy.com/listing/1179407381/rad-tech-full-registry-review-or-current?click_key=175ca136743f9b802499a8eaec05de6858e40f49%3A1179407381&click_sum=769d53e9&ref=shop_home_feat_1&pro=1